Skeletal Anatomy Of Vertebral Column Part Ii

The atlas is the first cervical vertebrae that supports the skull. The axis is the second cervical vertebrae, while thoracic and sacrum are not part of the cervical vertebrae.

The axis vertebra (C2) is the second cervical vertebra and is responsible for rotation of the head.

The odontoid process, also known as the dens, is a protuberance on the axis bone in the neck.

The vertebral column is divided into five regions: cervical, thoracic, lumbar, sacral, and coccygeal. The thoracic region is located in the middle of the vertebral column and is characterized by the presence of 12 thoracic vertebrae.

The lumbar region is the lower part of the vertebral column, situated between the thoracic region and the sacral region.

The sacrum is a triangular bone located at the base of the spine, between the two hip bones. It forms the back of the pelvis and connects to the coccyx at the bottom.

The correct answer, anterior sacral foramina, refers to the openings on the anterior surface of the sacrum. Posterior sacral foramina are openings on the posterior surface. The sacral promontory is a prominent edge of the sacrum. The sacral hiatus is an opening at the inferior end of the sacrum.

The median sacral crest is the bony ridge located in the middle of the sacrum. It is an important anatomical landmark in the human pelvis.

The correct answer refers to the openings on the posterior aspect of the sacrum where the sacral nerves exit. The incorrect answers are other structures or parts of the sacrum that are not specifically related to the posterior sacral foramina.

The sacrum consists of various structures, but the sacral canal is a specific opening in the sacrum that houses the spinal cord.