Bursitis and tendinitis are both common conditions that cause swelling around muscles and bones. They occur most often in the shoulder, elbow, wrist, hip, knee, or ankle. A bursa is a small, fluid-filled sac that acts as a cushion between a bone and other moving body parts such as muscles, tendons, or skin.
In higher vertebrates, such as reptiles, birds and mammals, there are 12 pairs of cranial nerves. Lower vertebrates, such as fish and amphibians, have 10 pairs of cranial nerves. Continue Reading.
The 12 cranial nerves each have a name and corresponding Roman numeral. 1  I is the olfactory nerve. 2  II is the optic nerve. 3  III is the oculomotor nerve. 4  IV is the trochlear nerve. 5  V is the trigeminal nerve. 6  VI is the abducens nerve. 7  VII is the facial nerve.