The pelvic cavity is a blind bottom closing the lower part of the trunk; it is composed of a skeletal waist, formed by the sacrum-coccyx column and iliac bones.
In a man, it contains colons, bladder, pelvic portion of the urethra, seminal vesicles, different ducts, prostate, sacrum plexus and its nerves; in a woman, it contains besides colons, bladder, part of the urethra and sacrum plexus, ovaries, tubes, uterus and higher part of the vagina.