Name the two primary functions of the femur

The femur is the largest and strongest bone in the human body and makes up a quarter of the body's height. The femur is attached to the hip via a ball and socket joint, providing movement and a source to articulate the pelvis. The ball joint is attached by a narrow neck laterally to the vertical femur shaft.
The femur is joined to several muscles via attachment sites. The trochanter connects the femur to the large muscles of the thigh and buttocks. The posterior side of the femur connects to the tibia via the medial and lateral condyles while the anterior side connects to the kneecap via the patellar surface. All of these attachments all serve to articulate the muscles and bone. With so many functions and sites of movement, the femur is split into three regions for study, namely the proximal, shaft and distal.
The neck of femur in the proximal area is most likely to break as it is the thinnest part of the ball and socket joint.

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