Question

Complete the Concept Map to identify bones forming the pelvic girdle, including their major bone markings, and relate their structure and arrangement to the function of this girdle.

Answer 1

The answers are pelvic girdle, sacrum, pubis, ischium, iilium , greater sciatic notch, acetabulum and obturator foramen respectively.

Figure is attached below.

Explanation:

Pelvic girdle is the largest complex bone system of human body. It's formed by fusion of 5 sacral vertebrae and 4 coccygeal vertebrae forming sacrum, the iilium, ischium, and the pubic bone. The iilium, ischium and pubis fuses to form single bone called os inominatum.

Two os inominata are joined with sacrum on both sides.

In the iilium, there are groves for the sciatic nerve which lets the sciatic nerve to pass from lumber region into the legs.

Acetabulum is the fossa for the head of the femur to get attached. It's formed by all the three bones.

Obturator foramen is formed by ischium and pubis through which passes the obturator nerve and obturator vessels.