Bursae of knee joint

The synovial membrane of the knee joint forms several fluid-filled synovial sacks and pockets around the joint that are called bursae (singular: bursa). Four of these bursae typically communicate with the synovial cavity of the knee joint, and these are:

There are several more bursae that are not connected with the synovial cavity, including:

NOTE: Some of the leg muscles have been moved away from the bone in order to better visualize the bursae in the 3D model.