(posterior)
The femur is the longest and strongest bone of the human skeleton. It forms the bony foundation of the thighs.
The biggest part of the femur is formed by its body, Corpus femoris. It has a triangular crossection and therefore three edges.
At the cranial end of the femur there is the femoral head, Caput femoris, that is attached via the neck, Collum femoris, that sits at an angle of about 135° towards the body. The angle betwwen head and body is called Collum-Diaphysis-angle.
At the lateral end of the connection between neck and body there are two body protrusions, the trochanters. The major trochanter lies ventrally and the minor trochanter dorsally. They form attachement points for the thigh muscles. This is also true for the grove between the protusions, the intertrochantal line ventrally. Dosally there is a sharp bone ledge between the trochanters, the Crista intertrochanterica.
On the dorsal body there is the Linea aspera that forms the attachement point for almost all thigh aduuctors.
The caudal end of the femur is formed by the articulation areas towards the tibia, the medial and lateral condyles. At their sides there are small bone protusions, the medial and lateral epicondyles. Slightly above the medial epicondyle is the Tuberculum adductorum that forms the attachment point of the Musculus adductor magnus and forms the caudal border of the Hiatus adductorius.
(Source: Dr. F. Gaillard (radiopaedia.org))