Arterial blood vessel and Pulmonary artery

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

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

Pulmonary artery noun - One of two arteries (branches of the pulmonary trunk) that carry venous blood from the heart to the lungs.

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