a capillary
artery
The aorta is the largest artery.
There is no portal artery. A portal vein connects one capillary bed to a second capillary bed. (in series)
a capillary
the smallest blood vessel is the capillary, then the vein, and the artery. (vein and artery depends though because when they diffuse they get smaller and close to the same size) but the smallest will always be the capillary.
Artery, Vein and Capillary
Myrae Ging Bonner
Artery -> Arteriole -> Capillary -> Venule -> Vein
the wall of an artery is usuallythicker that the wall of a vein.
The aorta has thicker walls as it is an artery not vein.
NO
The answer is an artery(arteries), a vein(veins), and a capillary(capillaries)