Through which canals do the internal carotid arteries ascend into the skull?

• A. Carotid canals
• B. Foramen ovale
• C. Foramen magnum
• D. Optic canal

Answer: (A)

The main idea is how the internal carotid arteries enter the skull. They ascend from the neck and pass upward through the carotid canals in the petrous part of the temporal bone. Those bony tunnels are the exact passages that lead the arteries from the exterior into the cranial cavity, after which they continue into the middle cranial fossa. The other openings—such as foramen ovale, foramen magnum, and the optic canal—transmit different structures (like the mandibular nerve, the brainstem/spinal cord area with vertebral arteries, and the optic nerve with the ophthalmic artery, respectively). So, the arteries enter the skull via the carotid canals.