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Flashcards in skeletal 2 Deck (30)
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1
Q

Compact bone

A

dense smooth, outer layer bone

2
Q

Osteon

A

unit of compact bone

Blood & nerve supply

3
Q

Central (= Haversian) canal

A

@ center of osteon

4
Q

Volkmann’s (perforating) canals

A

perpendicular to central canal

Connect central canals to surface

5
Q

Lacunae w/ osteocytes

A

in layered rings

6
Q

Canaliculi

A

contain osteocyte processes in their radiating boney channels – interconnecting cells

7
Q

Lamellae

A

layered rings of osteocytes in lacunae)
Osteonic lamellae (concentric rings around central canal)
Alternating canaliculi directions are strong
Interstitial lamellae (between osteons)
Circumferential lamellae
External – external to all compact bone
Internal – internal to compact bone

8
Q

CT Membranes of Osseous Tissue

A

Endosteum –

Periosteum

9
Q

Endosteum

A

internal to spongy bone, outlines medullary cavity

10
Q

Periosteum

A

around compact bone
Outer layer is fibrous & acts as attachment site for muscles, tendons, & ligaments.
Inner layer is osteogenic w/ Sharpey’s fibers attaching to compact layer.
Nutrient foramina pierce both.

11
Q

Chemical Composition of Bone

A

Bone is a CT = cells + calcified matrix

Cells – CT so these are from mesenchyme

12
Q

Osteoprogenitor

A

(“like osteogenic”) – stem cell for other types

13
Q

Osteoblast – BLAST

A

immature cell, secretes matrix

14
Q

Osteocyte – CYTE

A

mature cell, maintains matrix

15
Q

Osteoclast – CLAST

A

destroying cell, “eats” matrix

16
Q

Compact bone

A

dense smooth, outer layer bone

17
Q

Osteon

A

unit of compact bone

Blood & nerve supply

18
Q

Central (= Haversian) canal

A

@ center of osteon

19
Q

Volkmann’s (perforating) canals

A

perpendicular to central canal

Connect central canals to surface

20
Q

Lacunae w/ osteocytes

A

in layered rings

21
Q

Canaliculi

A

contain osteocyte processes in their radiating boney channels – interconnecting cells

22
Q

Lamellae

A

layered rings of osteocytes in lacunae)
Osteonic lamellae (concentric rings around central canal)
Alternating canaliculi directions are strong
Interstitial lamellae (between osteons)
Circumferential lamellae
External – external to all compact bone
Internal – internal to compact bone

23
Q

CT Membranes of Osseous Tissue

A

Endosteum –

Periosteum

24
Q

Endosteum

A

internal to spongy bone, outlines medullary cavity

25
Q

Periosteum

A

around compact bone
Outer layer is fibrous & acts as attachment site for muscles, tendons, & ligaments.
Inner layer is osteogenic w/ Sharpey’s fibers attaching to compact layer.
Nutrient foramina pierce both.

26
Q

Chemical Composition of Bone

A

Bone is a CT = cells + calcified matrix

Cells – CT so these are from mesenchyme

27
Q

Osteoprogenitor

A

(“like osteogenic”) – stem cell for other types

28
Q

Osteoblast – BLAST

A

immature cell, secretes matrix

29
Q

Osteocyte – CYTE

A

mature cell, maintains matrix

30
Q

Osteoclast – CLAST

A

destroying cell, “eats” matrix