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15 Cards in this Set

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What is the Purpose of the Skeleton?
1. Support internal organs
2. Provide for muscular attachment
3. Provide levers for movement
4. Red blood cell production (femur)
5. Protection/defense
6. Storage of minerals (calcium)(magnesium)
How many bones are in the human body?
206 bones are in the human body
What are bones made with?
1. 20-25% H2O (80 when born decreases to 60)
2. 60-70% Calcium phosphate,calcium carbonate, protein mineral matrix, salts(provides density & resists compression)
3. Collagen- strong materal
(Elastic protein that resists forces of tension)
4. Capable of resisting up to 6 times its mass if healthy
(ostioprosis not healthy)
What are the two Skeletal Divisions?
Axial & Appendicular
Axial Skeleton:
1. Skull
2. Vertebral column
3. Bony thorax (ribs & sternum)
(supports the head, neck, and torso)
(Protects brain, spinal cord, heart, & lungs)
Appendicular Skeleton:
Purpose is for mobility.
Upper and lower limbs
(upper includes shoulder girdle)
(Lower includes pelvic girdle. (hips))
Which is more important, the axial or appendicular skeleton?
Axial is most important because it protects all the main organs.
Of the 206, how many can a person voluntarily engage?
177.
Name the different types of bones.
1. Long
2. Short
3. Flat
4. Irregular
5. Sesamoid
Can some bones fit into more then one catergory?
Yes.
(Example- the small bones in your wrist are both short and irregular.)
Long bones
1. cylindrical shaft
2. Protruding (knobby) ends
3. Shaft has a medullary canal
4. Provide rigid framework of bodies levers.
Name some long bones.
Phalanges (fingers), Metatarsals (toes), Metacarpals (hand), Tibia (big leg), fibula (small leg), Femur, radius (arm thumb), ulna, humerus (arm)
Short Bones
Small, chunky, and solid bones. For example your carpols (hand), and foot.
Flat bones
curved surface and vary from thick to thin. Example your ribs and your scapula (back of shoulder)
Irregualr Bones
Irregualr shaped bones. Example your vertebrae and your pelvic girdle.