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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

Mineral components in bone

ESPECIALLY hydroxyapatite (unique to bone) and calcium carbonate; phosphate