In human anatomy, the pelvis (plural pelves or pelvises, sometimes also called pelvic region of the trunk) is the lower part of the trunk, between the abdomen and the lower limbs (legs). The pelvis includes several structures:

In the human, the pelvic skeleton is formed in the area of the back (posterior dorsal), by the sacrum and the coccyx (the caudal portion of the axial skeleton), and laterally and anteriorly (forward and to the side), by a pair of hip bones, the lower extremity, (parts of the appendicular skeleton). In an adult human being, the pelvic skeleton is thus composed of three large bones, and the coccyx (3–5 bones); however, before puberty, each hip bone consists of three discrete (separate) bones — the ilium, ischium, pubis — that have yet to fuse at adulthood; thus, in puberty, the human pelvic skeleton can comprise more than 10 bones, depending upon the composition of the person’s coccyx.

The bony pelvis (or pelvic skeleton) is the section between the legs and the torso that connects the spine (backbone) to the thigh bones. In adults, it is mainly constructed of two hip bones, one on the right and one on the left of the body. The two hip bones are each made up of 3 sections, the Ilium, Ischium and Pubis. These sections are fused together during puberty, meaning in childhood they are separate bones. Along with the hip bones is the Sacrum, the upper-middle part of the pelvis, which connects the spine (backbone) to the pelvis. To make this possible, the hip bones are attached to the Sacrum.