THE HEART
• The main organ of the cardiovascular system. Pumps blood
through the vessels in order to get oxygen and nutrients to deliver
it to necessary cells. It also pushes the blood through the vessels
to take out wastes from the blood.
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THE
VEINS
These are the vessels that
bring the blood from the
heart to the body. Many of
these veins contain
deoxygenated blood (blood
without oxygen).
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THE
ARTERIES
Like veins, these bring the
blood from the heart to the
body. Unlike veins, these
contain oxygenated blood
(blood with oxygen).
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THE
CAPILLARIES
These are vessels that have
walls only one cell thick,
allowing oxygen to go into
the blood and enter into cells
that need oxygen. When
oxygen leaves, carbon
dioxide and wastes go
through the capillaries and
into the blood to be disposed
of.
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THE
BLOOD
This is the medium that
carries important nutrients,
gases, and liquids that
supply the body while
carrying wastes to be filtered
out of the body. Blood is
mostly made of red blood
cells, white blood cells,
platelets, and
minerals/liquids.
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