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b. Classes of levers. Class I, II, and III – based on efficiency. See Holt, Page 87. Class I. Class II. Class III. B. Bone Development. (Reading pp 157-160) . Bone formation = Ossification. . Two types. Intramembranous and Endochondral See – Lab 3 section “ossification”.

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B classes of levers
b. Classes of levers

Class I, II, and III – based on efficiency.

See Holt, Page 87





B bone development
B. Bone Development.

(Reading pp 157-160)



Two types
Two types

Intramembranous and Endochondral

See – Lab 3 section “ossification”


C injuries and disease
C. Injuries and disease.

(Reading page 189)


1. The knee joint.

a. anterior cruciate

b. posterior cruciate

c. lateral collateral

d. medialcollateral


2. Dislocation = tearing of ligaments that keep bones in place (bone is forced out of position.)


3. Sprain = Damage to ligaments. (tearing or straining tendons or ligaments)


4. Fractures

a. compound - bone sticks out through the skin

b. simple - bone doesn't stick out through the skin







5. Arthritis

a. rheumatoid arthritis - inflammation of synovial membrane - articular hyaline cartilage destroyed


6. Rickets - from deficiency of vitamin D preventing ossification. The bones actually bend because cartilage still dominates. Vitamin D is needed for calcium and phosphorus absorption.


Summary
Summary:

What are the functions of the skeleton?







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