Circulatory System.
Viens are an important part
of our circulation system
they are responsable for
returning deoxidnate blood
back to the heart after ateries
carry blood out.
The vena cava is the
largest vein in the body.
Veins have much thinner walls
than arteries.
Arteries and arterobes
arteries are blood vessels
that carry blood away from
the heart.
The heart around the body
and keeps you alive. you need
the heart other wise you
wouldnt be alive.
This is a diagram of the ciculartory
system.