The arteries carry blood away from the heart. The aorta is the main artery that carries oxygen rich blood from the heart to the rest of the body.
an artery
Thicker
arteries
veins
artery
It is a vein.
Veins
The arteries
Arteries.
Arteries carry blood from the heart to the organs of the body.
there are only 2 vessels that take blood from the heart. The Pulmonary trunk that bifurcates into the (right and left) pulmonary arteries. and the aorta. the aorta is the largest vessel in the body and certainly would be considered thick walled.
Pulmonary veins.