It consists of the two hip bones, the sacrum, and the coccyx that enclose the pelvic cavity and its contents.

The contents of the pelvis are the urinary bladder and rectum in both sexes; in addition, the male has the seminal vesicles and the prostrate gland surrounding the neck of the bladder; while the female has the womb, ovaries, and their appendages.

It is divided into the major pelvis and the minor pelvis y an oblique plane formed by the terminal lines at the sides and in front and the sacral promonotory behind. The major pelvis also forms the lower portion of the abdomen.

The renal pelvis is that part of the collecting system proximal (nearest) to the ureter which collects urine from the renal pyramids.