A blood vessel is a tube in which blood circulates.
Blood flows continuously through the blood vessels.
Blood vessels flow blood throughout the body.


There are three types of blood vessels:

  • arteries,
  • veins
  • and capillaries.


Arteries carry blood away from the heart to the body.


Veins carry blood back from the body to the heart.


Capillaries are small vessels that connect arteries and veins.

Types of blood vessels and their functions
Arteries, veins and capillaries
Source | eMedTV

Blood vessels
Source | Operation Ouch