Synovial bursae

Bursitis is the inflammation of one or more bursae in the body. Bursae are small sacs filled with lubricating synovial fluid that decrease friction at contact points between bones, skin, tendons, and muscle. Irritation of the bursae usually occurs as a result of overuse or trauma, but may also occur due to systemic illnesses. While there are more than 150 bursae in the human body, common sites of bursitis include the shoulder, elbow, hip, and knee. Bursitis is typically associated with redness and swelling, but may also be associated with pain, warmth, or decreased range of motion. Bursitis is

small fluid-filled sac lined by synovial membrane with an inner capillary layer of viscous fluid

Human disease

Synovial cavity

medical condition

medical condition

Fluid-filled sac of the knee joint