The pelvis is a bony structure located at the base of the spine, connecting the trunk to the lower limbs. It consists of several bones, including the ilium, ischium, and pubis, which form the hip bones. The pelvis supports the weight of the upper body when sitting and standing and protects the organs in the pelvic cavity, such as the bladder and reproductive organs. The pelvic cavity is divided into two regions: the greater pelvis and the lesser pelvis. The greater pelvis is the upper part, while the lesser pelvis contains the reproductive organs and the rectum. The pelvic floor, made of muscles and connective tissue, supports these organs and plays a crucial role in functions like urination and childbirth.