Final answer:
The average number of cervical vertebrae in almost all mammals, including humans, is seven. The cervical spine has characteristic features such as a small body, a bifid spinous process, U-shaped transverse processes with a transverse foramen, and curved transverse processes for cervical spinal nerve passage. AP measurements of the cervical spine may vary depending on individual body size but are not typically reported.
Step-by-step explanation:
What is the average AP cervical spine?
The average number of cervical vertebrae in almost all mammals, including humans, is seven. These vertebrae have characteristic features such as a small body, a bifid (Y-shaped) spinous process, U-shaped transverse processes with a transverse foramen, and sharply curved transverse processes to allow for passage of the cervical spinal nerves. The second cervical vertebra (C2), called the axis, has a distinct dens (odontoid process) that joins with the anterior arch of the atlas. The average AP (anterior-posterior) measurements of the cervical spine may vary depending on individual body size but are not typically reported. It is important to note that AP measurements of the cervical spine are usually taken in a medical context and may be related to specific medical conditions.