What Is the Last Anatomy of the Spine?
The last anatomy of the vertebral column is the sacrum and coccyx. The sacrum is a triangular bone formed by five fused vertebrae, and the coccyx, or tailbone, is a small bone below it. Together they form the stable base of the spine.
Structure and Key Features
The sacrum connects the lumbar spine to the pelvis and supports body weight. The coccyx provides attachment points for muscles and ligaments of the pelvic floor. Each segment has a defined shape, foramina, and surface landmarks that clinicians use for orientation and procedures.
Clinical Relevance and Common Terms
In medicine, the last anatomy is relevant for sacral fractures, coccydynia, and pelvic assessments. Imaging often focuses on the sacrococcygeal junction. For detailed diagrams and definitions, see the National Cancer Institute's anatomy glossary at Cancer Terms Dictionary.
