The pulmanary vein. It comes out of the Right ventricle (heart) and goes to fill the capillary bed in the lungs. Actually it isn't strictlly true to say it opens into a capillary as there are venules before the capillaries. It also is the only vien that conducts blood away from the heart and not towards it.
a capillary
artery
it has a single tunic- only the tunica interna
There is no portal artery. A portal vein connects one capillary bed to a second capillary bed. (in series)
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.
The aorta is the largest artery.
Artery, Vein and Capillary
Myrae Ging Bonner
Artery -> Arteriole -> Capillary -> Venule -> Vein
NO
The answer is an artery(arteries), a vein(veins), and a capillary(capillaries)
Venules, they are smaller than Veins