There are two. The main one which is viewable through the skin is the dorsal blood vessel. The smaller one found under the intestine is the ventral blood vessel.
This artery is called the dorsal aorta and it is a main artery leading from the heart. It divides and branches out to smaller arteries that ensure that all of the body is supplied with oxygen.
The aorta is the vessel that carries oxygenated blood from the heart. In contrast, the pulmonary artery is the vessel that carries deoxygenated blood from the heart.
your heart
Aorta.
me
arteries
artery
Veins are the blood vessels that carry the blood to your heart
veins, maybe
The artery.
arteries
The pulmonary artery carries blood from the heart to the lungs. It is the vessel that carries blood from the right ventricle.