THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The coccyx is a triangular bone that consists of 3 to 5 fused segments, the largest of which articulates with the lowest sacral segment. In addition, the first coccygeal segment contains rudimentary articular processes called the coccygeal cornua that articulate with the sacral cornua.

Detailed explanation-2: -The coccyx is often called your ‘tailbone’ and is vestigial, meaning its function (as a tail) has been lost though evolution. It does have some function though, including helping you to balance and feel stable when sitting. Your body weight is distributed between your pelvic bones and tailbone when sitting to do this.