Subcutaneous bursa

Definition

A subcutaneous bursa is a small fluid-filled sac located between the skin and bony prominences, primarily serving as a cushion to reduce friction during movement. It plays an essential role in the smooth motion of joints by facilitating the sliding of skin over underlying bone.

Related terms

Synovial fluid: A viscous, non-Newtonian fluid found in the cavities of synovial joints that reduces friction between the articular cartilage of synovial joints during movement.

Synovial joint: A type of joint that is surrounded by a flexible sac called a synovial membrane which secretes synovial fluid for lubrication, allowing for wide ranges of movement.

Bursitis: An inflammation of a bursa, often resulting in pain, swelling, and limited movement in the affected area, typically caused by repeated pressure or friction