Ilium (bone)
Ilium (bone)
The Ilium (pronounced: /ˈɪliəm/) is the uppermost and largest part of the hip bone, and appears in most vertebrates including mammals and birds but not bony fish. All reptiles have an ilium except snakes, although some snake species have a tiny bone which is considered an ilium.
Etymology
The term "ilium" was derived from the Latin word "ilium", meaning "flank or hip". The name is thought to have originated from the fact that this bone is located near the hips.
Structure
The ilium of the human is divisible into two parts, the body and the ala. The separation is indicated on the top surface by a curved line, the arcuate line, and on the external surface by the margin of the acetabulum.
Function
The ilium functions to anchor the pelvis and support the weight of the upper body, while also protecting the delicate organs in the pelvic region. It also provides attachment points for a variety of muscles, including the large muscles of the buttock, hip, and thigh.
Related Terms
- Acetabulum: The socket of the hipbone, into which the head of the femur fits.
- Pelvis: The large bony structure near the base of the spine to which the hind limbs or legs are attached in humans and many other vertebrates.
- Hip bone: A large flat bone formed by the fusion of the ilium, ischium, and pubis, located in the pelvic region.
See Also
External links
- Medical encyclopedia article on Ilium (bone)
- Wikipedia's article - Ilium (bone)
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