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femur
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Anterior view diagram of a human femur showing labeled anatomical features, including the head, neck, greater and lesser trochanters, shaft, nutrient foramen, lateral and medial condyles, patellar surface, epiphyseal lines, and attachment lines for synovial membrane and fibrous capsule. Side-by-side anatomical illustration comparing the right leg of a modern human and a gorilla, showing labeled skeletal structures and major muscles including pelvis, femur, tibia, fibula, and key thigh muscles. The Human Body
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full human skeleton
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Anterior view diagram of a human femur showing labeled anatomical features, including the head, neck, greater and lesser trochanters, shaft, nutrient foramen, lateral and medial condyles, patellar surface, epiphyseal lines, and attachment lines for synovial membrane and fibrous capsule.
human femur Anterior view of the right femur (thighbone).

femur

anatomy
Also known as: thighbone
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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femur, upper bone of the leg or hind leg. The head forms a ball-and-socket joint with the hip (at the acetabulum), being held in place by a ligament (ligamentum teres femoris) within the socket and by strong surrounding ligaments. In humans the neck of the femur connects the shaft and head at a 125° angle, which is efficient for walking. A prominence of the femur at the outside top of the thigh provides attachment for...

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