What is the proper anatomical term for the tailbone?

The tailbone is anatomically referred to as the coccyx. It is a small, triangular bone located at the base of the vertebral column, formed by the fusion of several vertebrae. The coccyx serves as an attachment point for various muscles, tendons, and ligaments and plays a crucial role in supporting the body when sitting.

Understanding the role and position of the coccyx is important, particularly in fields involving human anatomy and physiology, as it can provide insight into certain medical conditions or injuries related to the pelvic region. The sacrum, while closely related in location and function, refers to a larger bone above the coccyx that is made up of fused vertebrae and forms the back part of the pelvis. The pelvis itself is the bony structure that connects the spine to the femurs and supports the pelvic organs. Ischium is one of the three main bones making up the pelvis and contributes to the structure of the hip. Knowing these distinctions helps clarify why 'coccyx' is specifically the correct term for the tailbone.