Iliac crest.
The pelvis is comprised of four bones Two innominate bones: Each of these bones is made up of three parts: the ilium, the ischium and the pubis. The iliumis the large flared out part. Its concave inner surface is the iliac fossa. The curved upper border is the iliac crest. When you place your hand on your hip it rests on the iliac crest. At the front of the iliac crest there is a bony prominence known as the anterior superior iliac spine and below it is the anterior inferior iliac spine.  Posterior border extends from the posterior superior iliac spine to the upper end of the posterior border of the ischium. It is marked by prominence called posterior inferior iliac spine and lower a large deep notch called the greater sciatic notch. Hip bone is also known as inominate bone or pelvic bone and is formed by fusion of three bones namely ilium, ischium and pubis bones. Hip bone forms part of pelvis and takes part in hip joint articulation. The hip bone is made up of the three parts – the ilium, pubis and ischium. The major portion of the pelvis is composed of two bones, each called the ilium — one on either side of the backbone (or spinal column) and curving towards the front of the body. When you place your hand on either hip, your hand rests on the iliac crest, which is the upper border of the ilium on that side.  Medial Border is on the inner surface of the ilium from the iliac crest to the iliopubic eminence and separates the iliac fossa from the sacropelvic surface. Its lower rounder part form the iliac part inlet of pelvis or arcuate line. Hip bone is also known as inominate bone or pelvic bone and is formed by fusion of three bones namely ilium, ischium and pubis bones. Hip bone forms part of pelvis and takes part in hip joint articulation. The hip bone is made up of the three parts – the ilium, pubis and ischium. Ilium is largest part of the hip bone and forms upper expanded plate in upper part and contributes to acetabulum formation in lower part. Roughly two fifth of acetabulum is contributed by ilium. Upper end of ilium is called iliac crest. Hip bone is also known as inominate bone or pelvic bone and is formed by fusion of three bones namely ilium, ischium and pubis bones. Hip bone forms part of pelvis and takes part in hip joint articulation. The hip bone is made up of the three parts – the ilium, pubis and ischium. The ilium (/ˈɪlɪəm/) is the uppermost and largest bone of the pelvis, 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 to be an ilium. External surface. (Body of ilium is the top of the blue circle in the center, and the wing of the ilium is the portion above that. Crest of ilium is labeled at top.). Plan of ossification of the hip bone. The sacrum is a large wedge shaped vertebra at the inferior end of the spine. It forms the solid base of the spinal column where it intersects with the hip bones to form the pelvis. The sacrum is a very strong bone that supports the weight of the upper body as it is spread across the pelvis and into the legs.  Iliac Crest. The iliac crest is the curved superior border of the ilium, the largest of the three bones that merge to form the os coxa, or hip bone. It is located on the superior and lateral edge of the ilium very close to the surface of the skin in the hip region. Click to read more below. The iliac crest is the curved superior border of the ilium, the largest of the three bones that merge to form the os coxa, or hip bone. It is located on the superior and lateral edge of the ilium very close to the surface of the skin in the hip region. The name comes from the Latin (ile, ilis), meaning groin or flank.. 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. External surface. (Body of ilium is the top of the blue circle in the center, and the wing of the ilium is the portion above that. Crest of ilium is labeled at top.). Plan of ossification of the hip bone.
http://learntech.uwe.ac.uk/pelvicanatomy/Default.aspx?pageid=2096 http://boneandspine.com/hip-bone-anatomy/ http://www.open.edu/openlearnworks/mod/oucontent/view.php?id=36&printable=1 http://boneandspine.com/hip-bone-anatomy/ http://boneandspine.com/hip-bone-anatomy/ https://en.wikipedia.org/wiki/Ilium_(bone) http://www.innerbody.com/image_skel05/skel14_spine.html http://www.innerbody.com/image_skelfov/skel18_new.html https://en.wikipedia.org/wiki/Ilium_(bone)
what is the upper curved border of the ilium called