Plz Help!

1) Osteoarthritis is a ?wear-and-tear? disease seen usually in the elderly. Rheumatoid arthritis is an autoimmune disease in which the body?s immune system attacks synovial joints, triggered by an infection or some other cause.

2) The triceps brachii attaches to the olecranon process. Contraction of the triceps brachii muscle causes the ulna to rotate around the distal humerus, causing extension of the forearm.

3) The true pelvis encloses the pelvic cavity and its superior limit is a line that extends from either side of the base of the sacrum, along the arcuate line and pectineal line to the pubic symphysis. The false pelvis consists of the expanded, bladelike portions of each ilium superior to the pelvic brim.

4) The pelvic girdle must withstand the load of bearing and moving the entire body whereas the pectoral girdle only supports the upper limbs.

Duddz