Which bone is one of three that fuse to form the pelvic ring?

The ilium is one of the three bones that fuse to form the pelvic ring, specifically contributing to the upper portion of the pelvis. The pelvic ring is composed of the ilium, ischium, and pubis, which are three separate bones that come together during the developmental stages of a person to provide strength and structural support to the pelvis.

The ilium is the largest of these components and is located on either side of the body, forming the upper part of the hip bone. It plays a crucial role in weight-bearing and serves as an attachment point for various muscles associated with the trunk, legs, and lower back. The development of the pelvic ring with these bones provides the structural integrity needed for functions such as locomotion and supporting the abdominal organs.