Skeletal system Flashcards
1
Q
- Shaft
- Composed of
compact bone
A
Diaphysis
2
Q
- Ends of the bone
- Composed mostly of
spongy bone
A
Epiphysis
3
Q
- Outside covering of the diaphysis
- Fibrous connective tissue membrane
A
Periosteum
4
Q
Secure periosteum to underlying bone
A
Sharpey’s fibers
5
Q
Supply bone cells with nutrients
A
Arteries
6
Q
- Covers the external
surface of the
epiphyses - Made of hyaline
cartilage - Decreases friction
at joint surfaces
A
Articular cartilage
7
Q
- Cavity of the shaft
- Contains yellow
marrow (mostly fat) in
adults - Contains red marrow
(for blood cell
formation) in infants
A
Medullary cavity
8
Q
- Cavities containing bone cells (osteocytes)
- Arranged in concentric rings
A
Lacunae
9
Q
- Rings around the central canal
- Sites of lacunae
A
Lamellae
10
Q
- Tiny canals
- Radiate from the
central canal to
lacunae - Form a transport
system
A
Canaliculi
11
Q
Mature bone cells
A
Osteocytes
12
Q
Bone-forming cells
A
Osteoblasts
13
Q
- Bone-destroying cells
- Break down bone matrix for remodeling and release of calcium
A
Osteoclasts
14
Q
break that does not
penetrate the skin
A
Closed (simple) fracture
15
Q
broken bone
penetrates through the skin
A
Open (compound) fracture
