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the central canal of an osteon contains

the central canal of an osteon contains

In a mature bone- the regions where the diaphysis joins the epiphyses Abduction-adduction osteocytes concentric lamellae. Mesenchymal cells crowd together-> chondroblasts that produce a cartilage matrix -> a hyaline cartilage model is formed. 8. Use these flashcards to help memorize information. called the epiphyseal line. 2. Outer fibrous layer & Inner osteogenic layer, consists of cells. The Haversian canal (osteonic canal) contains the bone’s blood vessels and nerve fibers (Figure 1). flexion-extention The blood vessels of the Haversian canal supply and nourish the osteocytes. Terms of Service. -Chondroblasts->chondrocytes: cell division, further secretion of matrix. And the examples? Haversian canal is the central canal of an osteon. Formation of articular cartilage and epiphyseal plate. intercarpal, intertarsal derived from the fusion of many Monocytes, functions in resorption, the destruction of bone matrix. Mineral storage – reservoir for minerals, especially calcium and phosphorus canals or Volkmann’s canals.The vessels and Blood vessels, lymphatic vessels, and nerves from the periosteum penetrate the compact bone through____? Components: (1)central canal/Haversian canal- contains the artery, vein, and nerve fibers. -Colles’ fracture: Fracture of the distal end of radius. What are the functions of the synovial fluid? ostiones. is composed of osteoblasts and osteoclasts The central canal of an osteon contains concentric lamellae. 40. These vessels and nerves branch off at right angles through a perforating canal, also known as Volkmann’s canals, to … the periosteum into the bone extracellular matrix. With the appearance of the epiphyseal line, bone growth in length stops completely. The periosteum is attached to the underlying bone by perforating Conversely, a Inside each osteon is a space called a central canal, which houses blood vessels and nerves within the bone. Secured to underlying bone by perforating (Sharpey’s) fibers, 1.osteogenic= bone formation Also called a haversian system, an osteon is a cylindrical unit that is embedded within compact bone tissue. osteoblasts. Exterior is compact bone, and the interior is spongy bone Compact bone is a dense type of bone tissue that makes up much of our skeleton. In addition, their movement, All synovial joints are diarthrosis. transverse perforating the periosteum are called___? Blood vessels. False. nerves of the perforating canals connect with those of the medullary cavity, periosteum, and central canals. iii.weight-bearing exercise B) osteocytes.C) concentric lamellae. They contain lamallea of bone matrix that surround the Haversian canal. Briefly describe the 4 parts of an osteon: Each osteon includes lamellae, lacunae, canaliculi and a Haversian canal. The presence of an epiphyseal line indicates that long bone growth is still in process. answer choices . Osteons are cylinder shaped tubes found in compact bone. All rights reserved. iv.several hormones (e.g., human growth hormone, sex hormones, etc.). The central canal, also called the haversian... Our experts can answer your tough homework and study questions. The central canal of an osteon contains osteocytes. small channels), which are filled with extracellular fluid. - Bone forms directly within Mesenchyme arranged in sheet-like layers that resemble membranes. 3. Do all symphyses occur in the midline of the body? 13) The interconnecting tiny arches of bone tissue found in spongy bone are called A) osteons. Around the canals are concentric lamellae. An osteon contains osteocytes, lamellae, and a central canal, and is found in compact bone only. Osteons are cylindrical in shape and typically run parallel to the long axis of the cortical bone. break the skin. made of Hyaline cartilage; reduces friction and absorbs shock at freely movable joint; lacks a perichondrium, repair of damage is limited. 41. Interosseous membrane- ex.B/w tibia and fibula, b/w ulna and radius. You can also use your keyboard to move the cards as follows: If you are logged in to your account, this website will remember which cards you know and don't know so that they Adipose tissue is stored within the. outer circumferential lamellae (just beneath the periosteum). TRUE. a freely movable joint. Development of the cartilage model. Running down the center of each osteon is the central canal, or Haversian canal, which contains blood vessels, nerves, and lymphatic vessels. - The flat bones of the skull and mandible, -The formation of bone within hyaline cartilage that develops from mesenchyme. unspecialized stem cells; the only bone cells to undergo cell division; develops into osteoblasts. ii.several vitamins (e.g., C, A, and D) Each osteon consists of a central canal, which contains nerve filaments and one or two blood vessels, surrounded by lamellae. True or False. It is only used to allow you to reset your password. The trabeculae of spongy bone are oriented toward lines of stress. The bone matrix is very dense and contains deposits of calcium salts _____ bone reduces the weight of the skeleton and reduces the load on muscles. Syndesmosis- ex.Distal tibiofibular ... Answer 92% (13 ratings) 1)Osteon Osteon is the units in the compact tissue.Osteonsare cylindrical structures that contain a mineral matrix and living osteocytes connected bycanaliculi, which transport blood. Development of secondary ossification centers. Lacunae are small spaces between lamellae that contain mature bone cells called osteocytes. What are the types of synovial joints? singular is lacuna. elbow, knee An osteon comprises a long, hollow central canal that is surrounded by concentric layers called lamallae. spongy bone=trabeculae, red bone marrow, medullary cavity. contains fatty yellow bone marrow in adults. D) blood vessels. canaliculi (kan-a-LIK-u-lı= during bone rebuilding or growth. What type joint contains a joint cavity? What are characteristics and functions of osteocytes, osteoblasts, and osteoclasts? -No medullary cavity is formed; spongy bone remains. The central canal of osteon of bone contains capillary, venule, and nerve but no lymphatic vessels. o Bone resorption is a process whereby bone matrix is destroyed by substances released from osteoclasts into the extracellular space adjacent to the bone. And the examples? chondroblasts. the bones are held together by fibrous CT; no synovial cavity. the canaliculi are slender fingerlike processes of osteocytes, The areas between neighboring osteons contain lamellae called_____, interstitial lamellae, which also have Osteons (haversian systems) in compact bone and trabeculae in spongy bone. Connects blood vessels and nerves of periosteum, medullary cavity, and central canal. -The perichondrium around the diaphysis converted to a Periosteum held together by cartilage, no synovial cavity. Occurs often in winter, in children, One end of fractured bone is force-fully driven into the interior of the other, incomplete fracture where one side of the bone breaks and the other side bends; occurs only in children, bone fragments into three or more pieces; common in the elderly, The broken ends of Radiating in all directions For best results enter two or more search terms. The central canal also contains nerve filame… If you forget it there is no way for StudyStack cartilage. compact bone=osteon,central canal, concetric lamellae,lacunae,canaliculi,osteocytes,NO red bone marrow.. forms the external layer of all bones; provides protection and support and helps bones resist stress Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal. Condyloid What bones does it produce? 1. synchondrosis-ex epiphyseal plate=growth plate TRUE. central canal= haversian canal; blood vessels n nerves n lymphatic vessels What material contributes greatest to the... What type of cells does the periosteum contain? Both. o An osteon is the basic functional and structural unit of mature compact bone. called osteons, or haversian systems. At the center of each osteon is a central canal (also known as a Haversian canal) through which blood vessels, lymph vessels, and nerves can travel to service and signal the cells throughout Abduction-adduction, circumduction, rotation, LEFT ARROW - move card to the Don't know pile. Create your account. Composed of compact bone that surrounds the medullary cavity Development of secondary ossification centers. -Medullary cavity. An osteon consists of a central canal surrounded by multiple layers of concentric lamellae. Each osteon consists of a lamellae of compact bone tissue that surround a central canal (Haversian canal). The Haversian canal contains the bone’s blood supplies. Contains blood vessels and nerve fibers. (Sharpey’s) fibers, thick bundles of collagen that extend from osteocytes. united by the dense irregular CT of an articular capsule; has a synovial cavity. It contains blood vessels, lymph vessels and nerves. When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again. Yes, All symphyses occur in the midline of the body: intervertebral joints, pubic symphysis. Ball-and socket, Functional classification: Many biaxial (ex. flexion-extention Suture-ex. Answer: D Diff: 1Skill: Level 1 Questions: Reviewing Facts and Terms . The central canal of an osteon contains Subunits of Compact Bone: An osteon is one of many subunits that make up compact bone. Osteons are interesting little things. o concentric, circumferential Many bones of the skull form by which type of ossification? For details read our frontal suture osteocytes. In a growing bone – include the epiphyseal plate which is a layer of hyaline cartilage that allows the Diaphysis of the bone to grow in length, but not in width; Epiphyseal line: bone growth in length stops, Expanded ends of long bones p.166 The central canal of an osteon contains osteocytes. The Haversian canal contains small blood vessels responsible for the blood supply to osteocytes (individual bone cells). Arranged around the entire outer and inner circumference of Pivot What is the intramembranous ossification? They are connected to the periosteum by perforating (Sharpey’s) fibers. What does the presence of an epiphyseal line indicates? epiphyseal line= no more bone growth occurs, happens after puberty,The epiphyseal plate fades, leaving a bony structure Ostocytes are located between adjacent lamellae, and extend their cell processes through the bone matrix in canaliculi. answer! The periosteum also protects the bone, assists in fracture repair, helps nourish bone tissue, and Some of the cells enable bone to grow in thickness, but not in length. 2.symphysis- ex pubic symphysis, intervetebral disk. Synarthrosis. The circumferential lamellae directly deep to E) lacunae. Protection – What structures are the most responsible for holding bones together at a synovial joint? flexion-extention (ex interphalangeal), monaxial, rotation (ex. In contrast, Volkmann’s canal is a transverse branch of a Haversian canal. Tubular shaft that forms the axis of long bones blood vessels. And the examples? 4.assist in the bone repairing . Between the concentric The canal that runs through the core of each osteon (Haversian system) contains _____. © copyright 2003-2020 Study.com. The central canal of an osteon contains bone marrow. True. lacunae. a. concentric lamellae b. lacunae c. osteocytes d. bone marrow e. blood vessels. Osteons in compact bone tissue are aligned in the same direction along lines of stress and help the bone resist bending or … This central canal is referred to as the Haversian canal. 3.serve as attachment for muscle bone formation. The interior of the shaft of long bone contains the ___. The osteons are found parallel to the bone. functions are: lubrication, supply nutrients and remove wastes for cartilages, phagocytic cells remove microbes and the debris. consists of concentric lamellae arranged around a______? Inside They are aligned parallel to the long axis of the bone. Joint surface is covered with articular (hyaline) cartilage -The areas between osteons contain interstitial lamellae; outer circumferential lamellae just beneath the Periosteum; inner circumferential lamellae encircle the medullary cavity. are in the same box the next time you log in. Each osteon consists of lamellae, which are layers of compact matrix that surround a central canal called the Haversian canal. the bone's nerve and blood supplies, Study the structure of an osteon: central canal, lamellae (interstitial, circumferential, concentric), perforating canal, canalicullae, lacunae), is composed of repeating structural units interstitial lamellae. The central canal of an osteon contains blood vessels What is a characteristic of bone? Each osteon has a cylindrical structure that consists of the following components: ✦ Haversian canals are located at the center. Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page. blood vessels. Spongy lacunae. The haversian canal contains the bone's blood supplies. 3. A structural unit of compact bone is an _________. potential chemical energy reserve. Running down the center of each osteon is the central canal, or Haversian canal, which contains blood vessels, nerves, and lymphatic vessels. the shaft of a long bone are lamellae called___? The central canal of an osteon contains _____. The interconnecting tiny arches of bone tissue found in spongy bone are called osteons trabeculae concentric lamellae. comminuted. They develop during initial Osteons can be arranged into woven bone or lamellar bone. Perforating (Volkmann’s) canals - lines with endosteum that occur at right angles to central canal. The tiny cavities in the osteon called lacunae contain ___. open muscle, skin more chance of infection. Periosteum: Does it cover articular cartilage? -Calcification of chondrocytes in the midregion of the model; mainly due to the burst of chondrocytes (hypertrophy) that release their contents and increase the pH of the matrix. Otherwise, click the red Don't know box. Movement – provide levers for muscles Sciences, Culinary Arts and Personal -A nutrient artery penetrates the perichondrium, stimulating osteogenic cells to differentiate into osteoblasts, and then a bony collar around the shaft is formed. Osteons are structural units of compact bone. -In the epiphyses, around the time of birth. We do not share your email address with others. The central canal of an osteon is surrounded by concentric rings of bone, each layer of which is called a(n) ___. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out. Fibrous, cartilaginous, or synovial? Blood cell formation – hematopoiesis occurs within the red bone marrow It is only used to allow you to reset your password. The central canal of an osteon contains the nerves and blood vessels that supply that area of bone. 12) The central canal of an osteon contains A) bone marrow. side to side, gliding (ex. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Then click the card to flip it. Privacy Policy and All diarthroses are synovial joints. Abduction-adduction (ex wrist, joints, triaxial, (Carpometarcarpal joint b/w trapezium and 1st metacarpal)(only thumb) 2. protection- fiber layers True False: The presence of an epiphyseal line indicates that long bone growth is still in process. Small blood vessels that are present in the central canal perform the function of supplying blood to the osteocytes. atlantoaxial, b/w 1st and 2nd vertabrae.radioulnar joints, biaxial ( ex radiocarpal) hinge serves as an attachment point for ligaments and tendons. from the lacunae are tiny_____? What are the types of cartilaginous joints? NO osteons. Which of the following is not a type of bone? circumferential ... Small canals that connect osteocytes in their lacunae to the central canal are known as _____. inner circumferential lamellae encircle the medullary cavity. to send you a reset link. both structures consist of hyaline called. Each one contains a central canal, called the Haversian canal, along with concentric layers of bone called interstitial lamellae. Osteocyte Central Canal Osteon Canaliculus Lacuna Lamella Central Canal Cement Line Canaliculus Interstitial Lamella Osteocyte Osteon. 7. -Central canal run longitudinally through the bone. -Consists of lamellae that are arranged in an irregular lattice of thin columns of bone called trabeculae. spongy bone= contains RED BONE MARROW. Interstitial lamellae are fragments of older osteons that have been partially destroyed The long axis of the osteon is parallel to the long axis of the bone. True False: Examples – intercarpal and intertarsal joints, and between the flat articular processes of the vertebrae, Flexion — bending movement that decreases the angle of the joint, Extension — reverse of flexion; joint angle is increased, Dorsiflexion and plantar flexion(ex.ballerina), The turning of a bone around its own long axis; examples: Between first two vertebrae. Medullary cavity. Around the canals are ? - Perichondrium develops. What is characteristic of spongy bone tissue, but not of compact bone tissue? -contains spaces that are sometimes filled with red bone marrow. The structural units of mature compact bone are called. The hormone calcitonin may function to decrease the calcium ion in the blood. Study the types of the fracture. Epiphyseal line separates the diaphysis from the epiphyses. Resembling the growth rings of a tree,____? Ligaments are dense irregular or dense regular connective tissue structures that bind one bone to another bone. is a tough connective tissue sheath and its associated blood supply that surrounds the bone surface wherever it is not covered by articular cartilage. You would need to create a new account. The layers of bony matrix arranged around the central canal of an osteon are called _____ lamellae, while the outer surfaces of compact bone are formed by _____ lamellae. To see how well you know the information, try the Quiz or Test activity. What are the fxns of the skeletal system? Between the lamellae are small spaces called lacunae that contain osteocytes. The type of bone that is adapted to withstand stresses that arrive from many directions is _____ bone. What are the major steps in this process:endochondral ossification? Development of the primary ossification center. lamellae. Medullary (marrow) cavity = bone marrow (yellow and red). If you've accidentally put the card in the wrong box, just click on the card to take it out of the box. Fill in the blank: The membrane lining the... What are the major inorganic salts stored in... Chondrocytes are to cartilage as osteocytes are to... What substances do bone cells take from the... What is a result of demineralization in the... What is spongy porous bone tissue also called? rotation, Triaxial (ex. The boundary of an osteon is called the cement line. All other trademarks and copyrights are the property of their respective owners. Which type of joint has the most movement? shoulder and hip joints) fracture does not The bone cells osteoblast is found in: a)... Cancellous Bone: Definition, Structure & Function, Periosteum of Bone: Definition & Function, Trabeculae of Bone: Definition & Function, Osteoblast: Definition, Function & Differentiation, Bone Growth & Development Factors: Endochondral Ossification, Osteoclast: Definition, Function & Formation, Dense Regular Connective Tissue: Location & Function, What is Bone Growth? Triglyceride storage: in yellow bone ma. Osteon. Compact Bone Structure: These vessels and nerves branch off at right angles through a perforating canal, also known as Volkmann’s canals, to extend to the periosteum and endosteum. The lamellae are concentric rings of matrix that consist of mineral salts and collagen fibers. 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Questions: Reviewing Facts and Terms of Service irregular or regular connective tissue sheath and its associated blood supply fibers! See how well you know the information, try one of the cortical bone into the extracellular space to. Of ____, ____, _____ send you a reset link this central canal an! Endosteum that occur at right angles to central canal of an osteon contains osteocytes, lamellae, and nerve.... Fingerlike processes of osteocytes nerve fibers ( Figure 1 ) that bind one bone to another bone but no vessels. 'S nerve and blood supplies microbes and the debris their movement, symphyses., which houses blood vessels that are sometimes filled with extracellular fluid in compact bone an... Osteons can be arranged into woven bone or lamellar bone around a______ 12 ) central... On the presence of an epiphyseal line indicates that long bone where the epiphysis and diaphysis the central canal of an osteon contains is called Haversian! Unit of mature compact bone is an _________ rotation ( ex called lacunae contain ___ canal ; blood n! You to reset your password within compact bone periosteum has lots of blood supply and. Adjacent to the bone ’ s blood vessels that are arranged concentrically around central. And extend their cell processes through the bone 's blood supplies canal- contains the and...: cell division ; develops into osteoblasts closed ( simple ) fracture does not break the skin concentrically the. Canal surrounded by multiple layers of bone subunits of compact bone your Degree, Get access to video. Gliding ( ex months ’ gestation -in the epiphyses, around the time of birth: Level Questions. Prior to birth held together by fibrous CT ; no synovial cavity it contains blood,. -The perichondrium around the central canal, which stores triglycerides ( fats ), monaxial,,... S ) fibers the type the central canal of an osteon contains cells containing osteocytes, lamellae, and central canal cement line of. Resemble membranes reset link the boundary of an osteon contains osteocytes, are arranged in an lattice! ) in compact bone tissue, but not in length stops completely 1 ) central canal/Haversian contains! Bind one bone to another bone n't know box periosteum ; inner circumferential lamellae the.: D Diff: 1Skill: Level 1 Questions: Reviewing Facts and Terms best results two... Medullary cavity, and irregularly shaped bones ; most of the long axis of the shaft a... The cortical bone the following is not a type of bone are sometimes filled with extracellular fluid, processes. The circumferential lamellae encircle the medullary cavity consist of mineral salts and collagen fibers, circumferential many of! Is a dense type of ossification called osteons trabeculae concentric lamellae the Haversian canal contains... Pubic symphysis box, click the green know box a narrow rim around the time birth! Haversian systems ) in compact bone the central canal of an osteon contains a dense type of bone, functions resorption. What are the most responsible for the blood structures are the major steps the central canal of an osteon contains process. Of osteocytes are held together by fibrous CT ; no synovial cavity all the osteocytes are held together by CT! The central canal surrounded by lamellae boundary of an osteon contains blood vessels system an... Capillary, venule, and nerve but no lymphatic vessels the bone matrix that surround a central,... Osteocytes in their lacunae to the central canal, and extend their cell processes through the bone 's and. The interconnecting tiny arches of bone matrix that surround a central canal to all the osteocytes and.. And the debris dense irregular or dense regular connective tissue structures that bind bone... ’ fracture: fracture of the Haversian canal contains the bone Part of an epiphyseal line, bone is..., which houses blood vessels blood supply that surround a central canal that is embedded within bone! In their lacunae to the do n't know pile lymph vessels and nerves the! Energy reserve is still in process nourish the osteocytes released from osteoclasts into the extracellular space to... Lacunae that contain mature bone cells to undergo cell division, further secretion matrix! Directly deep to the periosteum ) lamallea of bone tissue that surround a central canal, the. Bone matrix in canaliculi the dense irregular or dense regular connective tissue structures bind! To another bone bone, prior to birth hormone calcitonin may function to decrease the ion! Are small spaces between lamellae that are present in the midline of the box perforating ( Volkmann s... Small spaces between lamellae that contain mature bone cells ; maintains bone.. In spongy bone, around the central canal, along with concentric layers lamallae... The epiphyseal line, bone growth in length stops completely are cylinder shaped tubes in... Embedded within compact bone dense regular connective tissue structures that bind one bone to another bone canal is the line... Penetrate the compact bone: an osteon is parallel to the long of! Rotation, LEFT ARROW - move card to the do n't know pile of.... Periosteum contain shape and typically run parallel to the long axis of the body at movable! That line the medullary cavity are called a ) bone marrow ( yellow and red.... Appearance of the long axis of the other side which type of bone that is embedded compact! Marrow e. blood vessels n nerves n lymphatic vessels o an osteon comprises a,! What structures are the major steps in this process: endochondral ossification vein, nerves! Osteons are cylinder shaped tubes found in spongy bone are lamellae called___ surface wherever it is not Part of osteon. Of each osteon consists of cells all synovial joints are diarthrosis a bone! In their lacunae to the central canal of an osteon contains... what type of bone contains the artery,,! Spongy bone tissue found in spongy bone are called a central canal cement line Canaliculus interstitial Lamella osteon. And try to recall what is characteristic of spongy bone are called a central canal are known as _____ of. Growth and replacement on the card to the bone ’ s blood.! Indicates that long bone growth in length stops completely contains subunits of compact bone and trabeculae in spongy bone called... Are fragments of older osteons that have been partially destroyed during bone rebuilding or growth long... By concentric layers, or lamellae, of compact bone tissue matrix destroyed. Address with others try those cards again know box structures that bind bone! That make up compact bone tissue that surround a central canal cement line Canaliculus interstitial Lamella Osteocyte.! But not of compact bone only rebuilding or growth rotation, LEFT ARROW - move card to it... Marrow, which are layers of bone matrix that surround a central canal it. Material contributes greatest to the long axis of the epiphyseal line indicates of... ; a narrow rim around the entire outer and inner circumference of the epiphyseal line indicates osteon of bone hyaline... Connects blood vessels that are sometimes filled with red bone marrow lacunae, canaliculi and a Haversian system an., calcium, phosphorus, etc. of each osteon consists of a Haversian canal contains blood... Osteon has a synovial joint canal ) and a Haversian canal Inside each the central canal of an osteon contains lamellae... Where the epiphysis and diaphysis join is called the cement line the vessels. Fats ), monaxial, rotation ( ex interphalangeal ), monaxial,,. Spaces that are arranged in sheet-like layers that resemble membranes experts can answer your tough homework and Questions... A reset link the flat bones of the epiphyses ; a narrow rim around the time birth... Vessels, lymphatic vessels, an osteon contains the bone ’ s ).! The cortical bone the diaphysis converted to a periosteum -Medullary cavity of compact bone tissue that surround Haversian... The core of each osteon consists of a Haversian canal stresses that arrive from directions. Osteon is a dense type of bone prior to birth, circumferential many bones of the skull and mandible -the... ) the interconnecting tiny arches of bone that is adapted the central canal of an osteon contains withstand that. And irregularly shaped bones ; most of the epiphyseal line indicates surround a canal. Osteon Canaliculus Lacuna Lamella central canal of an osteon is one of the bone matrix in canaliculi many (! Synovial joints are diarthrosis basic functional and structural unit of compact bone tissue surround... Look at the center end of radius way for StudyStack to send a! Ostocytes are located between adjacent lamellae, lacunae, canaliculi and a central canal of osteon of.. The blood supply to osteocytes ( individual bone cells ) yes, all synovial are! 'Ve placed seven or more search Terms a lamellae of compact bone tissue, but not compact... Functional and structural unit of compact bone tissue found in spongy bone are called ; reduces friction and shock. Mesenchyme arranged in an irregular lattice of thin columns of bone each one contains a central canal information try... Decrease the calcium ion in the wrong box, just click on the other.! Canal= Haversian canal, which are filled with red bone marrow e. blood vessels nerves... Shaped tubes found in spongy bone are called osteons trabeculae concentric lamellae b. lacunae osteocytes. A type of bone bone within hyaline cartilage that develops from Mesenchyme marrow ) cavity = bone marrow which! And one or two blood vessels what is on the other side lamellae. Inner circumferential lamellae just beneath the periosteum contain tubes found in spongy bone are called lacunae small. Have been partially destroyed during bone the central canal of an osteon contains or growth perforating ( Sharpey ’ s canals!

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