Knee anatomy is the structure of the various components of the knee.

The joint itself consists of only three bones - the femur (thighbone), tibia (shinbone) and patella (kneecap). Between the two long bones is sandwiched the shock-absorbing meniscus.

knee anatomy anatomy of knee - capsule anatomy of the knee - cruciates and meniscus
The joint is fundamentally unstable with the rounded ends of the femur articulating with the flat top of the tibia. As the knee bends and straightens, the patella glides along a groove in the femur. The internal structures are contained within a waterproof sealed capsule, the inner lining of which secretes the joint fluid that lubricates the joint. The joint is stabilised with internal ligaments, such as the cruciate ligaments, as well as external ligaments such as the collateral ligaments.

The Anatomy of Knee Flexibility

A course explaining how the knee can become stiff.

Knee Anatomy

Simplified anatomy of the knee, with illustrations.

Arthroscopic Anatomy

Part 3 of a course on Diagnostic Arthroscopy by Dr (Mr) Angus Strover of the UK.