capillaries
The smallest blood vessels of the body = capillaries
A heart.
open
the blood travel through blood vessels is the Artrium or atria. :-)
The heart is a pump and move blood through the blood vessels.
Blood vessels are any of the tubes through which blood flows through the body.
Blood vessels are surrounded by smooth muscle. This is often known as visceral muscle. This type of muscle also lines the blood vessels and internal organs.
The Open Circulatory System. Hope I helped:)
the names are called vein or your blood vessels
so that the blood cannot flow the wrong way through the vessels
so all ur blood can get nutrients and oxygen.
The very famous organ that moves blood through blood vessels is the heart.