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.
â¢ In mammals, there are 12 pairs of cranial nerves while 31 pairs of spinal nerves exist. â¢ Spinal cords are named according to their location on the spinal cord, whereas cranial nerves are designated by serial numbers and names.