Answer: B A bursa is a fluid-filled sac found at most joints in the body. It is filled with synovial fluid. This sac serves as a cushion to the bones articulating at the joint. It helps to reduce friction and promote uninhibited movement.
A bursa is a small fluid-filled sac that cushions between bones and soft tissues, such as muscles, tendons, and skin. Bursae are found in joints throughout the body and help to reduce friction and irritation caused by movement.
Bursae are lined with a synovial membrane, which produces synovial fluid that lubricates the joint and provides nutrients to the surrounding tissues. Bursitis is a condition that occurs when a bursa becomes inflamed, often due to repetitive motions or injury. This inflammation can cause pain, swelling, and stiffness in the affected joint.
There are several types of bursae in the body, including:
- Subcutaneous bursae: Located just beneath the skin, these bursae help to cushion the skin and underlying tissues.
- Prepatellar bursae: Found in front of the kneecap, these bursae help to reduce friction between the kneecap and the skin.
- Infrapatellar bursae: Located below the kneecap, these bursae help to reduce friction between the kneecap and the thigh bone.
- Olecranon bursae: Found at the elbow, these bursae help to reduce friction between the skin and the bony prominence of the elbow (the olecranon).
- Trochanteric bursae: Located on the hip, these bursae help to reduce friction between the hip bone and the surrounding muscles and tendons.
