![]() It is divisible into a body, a superior ramus, and an inferior ramus. The pubic region or pubis is the ventral and anterior of the three parts forming the hip bone. ![]() Together with the sacrum and coccyx, the hip bones form the pelvis. The two hip bones join each other at the pubic symphysis. By the end of puberty the three regions will have fused together, and by the age 25 they will have ossified. They join each other in a Y-shaped portion of cartilage in the acetabulum. At birth, these three components are separated by hyaline cartilage. The hip bone is formed by three parts: the ilium, ischium, and pubis. Structure The skeleton of the human pelvis:ġ. Each hip bone is connected to the corresponding femur (thigh bone) (forming the primary connection between the bones of the lower limb and the axial skeleton) through the large ball and socket joint of the hip. They are connected to the sacrum, which is part of the axial skeleton, at the sacroiliac joint. The two hip bones join at the pubic symphysis and together with the sacrum and coccyx (the pelvic part of the spine) comprise the skeletal component of the pelvis – the pelvic girdle which surrounds the pelvic cavity. In some vertebrates (including humans before puberty) it is composed of three parts: the ilium, ischium, and the pubis. ![]() The hip bone ( os coxae, innominate bone, pelvic bone or coxal bone) is a large flat bone, constricted in the center and expanded above and below. ![]()
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