Arterial blood vessel and Vertebral artery

Arterial blood vessel noun - A blood vessel that carries blood from the heart to the body.

Vertebral artery and arterial blood vessel are semantically related. In some cases you can replace phrase "Vertebral artery" with "Arterial blood vessel", this phrases are similar.

Vertebral artery noun - The first branch of the subclavian artery; divided into four parts.

Arterial blood vessel and vertebral artery are semantically related. You can use "Arterial blood vessel" instead a noun phrase "Vertebral artery".