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Bone 2.

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Presentation on theme: "Bone 2."— Presentation transcript:

1 Bone 2

2 Morphology of a Long Bone
Diaphysis Metaphysis Epiphysis Epiphyseal Plate

3

4 Diaphysis Bone shaft between epiphyseal plates
Mostly compact bone; metaphysis is spongy bone (cancellous) Periosteum Endosteum Marrow cavity

5 Articular cartilage Epiphysis Epiphyseal plate Perichondrium Metaphysis Medullary cavity Periosteum Diaphysis Endosteum Compact bone Cancellous bone Metaphysis Epiphyseal plate (hyaline cartilage) Epiphysis Cancellous bone Articular cartilage (hyaline cartilage)

6 Metaphysis Distal ends of diaphysis Spongy (cancellous) bone

7 Epiphysis Distal ends of long bones Articular cap of hyaline cartilage
Medullary cavity is cancellous and contains a marrow cavity

8 Epiphyseal plate Junction between diaphysis and epiphysis
Hyaline cartilage in child Responsible for bone growth Periosteum become continuous with a perichondrium

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10 Compact bone Periosteum Endosteum Haversian system (osteon)
Volkmann’s canals Interstitial lamellae Outer circumferential lamellae Inner circumferential lamellae

11 Periosteum Fibrous (outer) layer Osteogenic (inner) layer
Fibroblasts; collagen; elastin Protection of bone Osteogenic (inner) layer Osteoblasts adjacent to bone surface Osteoprogenitor cells-precursors to osteoblasts Osteoclasts if remodeling is occurring

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13 Periosteum Blood vessels & nerves present
Sharpey’s fibers: anchor periosteum to bone

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15 Endosteum Between bone marrow and bone matrix
Layer of osteoblasts, osteoclasts, and a few osteogenic cells

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17 Interstitial lamellae Haversian system (osteon) Outer circumferential lamellae Inner circumferential lamellae Volkmann’s canal Haversian canal Periosteum

18 Haversian System (osteon)
Concentric lamellae of bone Up to ~ 10 lamellae/osteon Osteocytes and canaliculi Collagen planes in adjacent lamellae are perpendicular to each other Surround vascular passageways running longitudinally Contain blood vessels, nerves, lymphatics

19 Interstitial lamellae Haversian system (osteon) Outer circumferential lamellae Inner circumferential lamellae Volkmann’s canal Haversian canal Periosteum

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21

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23 Volkmann’s canals Observed in compact bone
Vascular passages that run radially Not surrounded by concentric lamellae Contain blood vessels, nerves, and lymphatics

24 Interstitial lamellae Haversian system (osteon) Outer circumferential lamellae Inner circumferential lamellae Volkmann’s canal Haversian canal Periosteum

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28 Interstitial lamellae
Remnants of partly resorbed osteons No vessels

29 Interstitial lamellae Haversian system (osteon) Outer circumferential lamellae Inner circumferential lamellae Volkmann’s canal Haversian canal Periosteum

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32 Outer circumferential lamellae
Beneath periosteum Usually do not encircle entire bone shaft

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34 Inner circumferential lamellae
Adjacent to endosteum Incomplete

35 Interstitial lamellae Haversian system (osteon) Outer circumferential lamellae Inner circumferential lamellae Volkmann’s canal Haversian canal Periosteum

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37 Fully formed osteon Developing osteon Osteoblast Prebone Haversian canal (with capillary) Cementing line

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39 End Bone 2

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41 Haversian canal Lamellae Lacuna Cement Osteocytes Processes

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