Hip bone is a large irregular bone, which expands irregularly from the center to the top and bottom. In some vertebrates (including pre-adolescent humans), it consists of three parts: ilium, ischium and pubis.

The two hip bones are connected at the pubic symphysis, and together with the sacrum and coccyx (the pelvic part of the spine), they form the bone component of the pelvis, that is, the pelvic girdle around the pelvic cavity. They are connected to the sacrum at the sacroiliac joint, and the sacrum is a part of the axial skeleton. Each hip bone is connected to the hip of the corresponding femur (femur) by a large ball-and-socket joint (forming the main connection between the lower limb bone and the axial bone).

Extended data

The function of human bone:

1, supporting role: different bones of the human body pass through customs? Joints, muscles, ligaments and other tissues are connected into a whole to support the body. If humans have no bones, they can only be a pile of soft tissues lying on the ground. They can't stand, let alone walk. ?

2. Protection: The human skeleton is like a frame, protecting the important organs of the human body and avoiding the "interference" and damage of external forces as much as possible. For example, the skull protects the brain tissue, the spine and ribs protect the heart and lungs, and the pelvis protects the bladder and uterus. Without the protection of bones, external shocks and blows can easily damage internal organs.

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