Blood typing may be used to: 1  Ensure compatibility between the blood type of a person who requires a transfusion of blood or blood components and the ABO and Rh type of the unit of blood that will be transfused. 2  Determine compatibility between a pregnant woman and her developing baby (fetus).
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.he 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.
The base projects forward as the sacral promontory internally, which is the uppermost portion of the sacrum. The central part is curved outward toward the posterior, allowing greater room for the pelvic cavity.The two lateral projections of the sacrum are called the alae (wings), and articulate with the ilium at the L-shaped sacroiliac joints.he floor of the groove is formed by the united laminae of the corresponding vertebrae. The laminae of the fifth sacral vertebra, and sometimes those of the fourth, do not meet at the back, resulting in a fissure known as the sacral hiatus in the posterior wall of the sacral canal.