Flashcards in Skeletal System Deck (121)
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30
How many sacrum vertebrae are there
5 (fused)
31
How many coccyx are there?
4 (fused)
32
Articulate
Put together; where they meet
33
Facet
Face
34
Process
Projection or outgrowth of tissue from after body
36
Tubercle
Nodule/small eminence, especially one on a bone for attachment of a tendon
37
What percent of our skeletal system being broken down and remade in one year?
25%
38
Smallest bones in the body
3 ear bones
39
Hyoid bone
Floating bone; only bone not connected to anything
40
What kind of cartilage is the articular cartilage at the ends of long bones (epiphysis)?
Hyaline
41
What kind of cartilage is in the ribs?
Costal (fibrocartilage)
42
Another name for the body of vertebrae
Centrum
43
What are four main functions of bone?
Support/protection, body movement, inorganic salt storage, and blood cell formation
Hint: SIP 'double' B
44
How many bones are in the adult
206
45
How many bones in newborn
270
46
Axial skeleton consists of:
skull, middle-ear bones, hyoid, rib cage, vertebral column, and sternum
47
Appendicular skeleton consists of:
upper/lower extremities, and the pectoral and pelvic girdles
48
Diaphysis
shaft of long bone
49
Epiphysis
ends of long bone
50
Trabeculae
slender plates of spongy bone
51
Function of osteoblasts
Make bone by making matrix (concentric circles); store calcium in bone; (become osteocytes)
52
Where are osteogenic cells?
Endosteum, inner periosteum, and the Haversian canals; only source of new cells of osteoblasts and osteocytes
53
Osteocytes
osteoblasts trapped in bone matrix; remain active in maintenance of bone
54
Osteoclasts
bone-DISSOLVING cells that form by fusion of monocytes; break down bone and release its minerals to the blood
55
What comes out of bone when osteoclasts break it down?
minerals; calcium
56
As you get older you get (more/less?) osteoclasts
more
57
What helps you to absorb calcium
Vitamin D
58
What systems won't work without calcium
muscular, skeletal, and nervous
59
Organic matter in bone
collagen, GAGS, proteoglycans, and glycoproteins
60
