The pelvis is located between the waist and the thighs of the human body, connecting with the spine above and the thighs of the lower limbs below, and is the pelvic skeleton connecting the spine and the lower limbs.
The pelvis is formed by the sacrum and coccyx, and the hip bones on the left and right sides. The entire pelvis is divided into a large pelvis and a small pelvis by taking the area where the iliopubic line and the upper edge of the sacral promontory are connected on both sides as the boundary, in which the upper part of the boundary is the large pelvis, which is also known as the pseudo-pelvis, and the lower part of the pelvis is the small pelvis, which is also known as the true pelvis.
The pelvis has the role of supporting the weight, can transfer the gravity of the upper limbs to the lower limbs on both sides, and the pelvis contains a large number of blood vessels and bladder, urethra, rectum, etc., and the role of protecting organs.