The bones of the free part of the lower extremity in humans and of any of the four extremities in animals. It includes the FEMUR; PATELLA; TIBIA; and FIBULA.

The bone of the lower leg lateral to and smaller than the tibia. In proportion to its length, it is the most slender of the long bones.

The longest and largest bone of the skeleton, it is situated between the hip and the knee.

The constricted portion of the thigh bone between the femur head and the trochanters.

The hemispheric articular surface at the upper extremity of the thigh bone. (Stedman, 26th ed)

The flat, triangular bone situated at the anterior part of the KNEE.

The second longest bone of the skeleton. It is located on the medial side of the lower leg, articulating with the FIBULA laterally, the TALUS distally, and the FEMUR proximally.