b. Classes of levers Class I, II, and III – based on efficiency. See Holt, Page 87
B. Bone Development. (Reading pp 157-160)
Two types Intramembranous and Endochondral See – Lab 3 section “ossification”
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: What are the functions of the skeleton?