Hip bone

Hip bone
Position of the hip bones (shown in red)
Details
Identifiers
Latin	os coxae, os innominatum
MeSH	D010384
TA98	A02.5.01.001
TA2	1307
FMA	16580 16585, 16580
Anatomical terms of bone [edit on Wikidata]

The hip bone (os coxae, innominate bone, pelvic bone^[1] or coxal bone) is a large flat bone, constricted in the center and expanded above and below. In some vertebrates (including humans before puberty) it is composed of three parts: the ilium, ischium, and the pubis.

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. They are connected to the sacrum, which is part of the axial skeleton, at the sacroiliac joint. 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.^[2]