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• Four types of valves regulate blood flow through your
heart:
• The tricuspid valve regulates blood flow between the
right atrium and right ventricle.
• The pulmonary valve controls blood flow from the right
ventricle into the pulmonary arteries, which carry blood
to your lungs to pick up oxygen.
• The mitral valve lets oxygen-rich blood from your lungs
pass from the left atrium into the left ventricle.
• The aortic valve opens the way for oxygen-rich blood to
pass from the left ventricle into the aorta, your body's
largest artery, where it is delivered to the rest of your
body
• The muscular walls of the heart is composed of
three layers and surrounds a cavity.
• This cavity is sectioned into four chambers: the
left and right atria, located at the top of the heart,
and the left and right ventricles positioned below.
• The atria receives blood from the body while the
ventricles pumps blood to the lungs and the
cells.
• the valves operate in one direction only. This
prevents a “back-flow” of blood back into the
atrium.
• From the right ventricle, blood is directed to the
lungs where it becomes oxygenated.
• The blood must first travel back to the left atrium
through the four pulmonary veins - two veins
from the left lung and two veins from the right
lung.
• The left atrium is smaller than its counterpart,
however, the walls are slightly thicker.
• As the left atrium is filled with blood from the
lungs, a pressure gradient is formed and causes
the atrioventicular (bicuspid) valve to open.
• This one way valve directs the blood into the left
ventricle where it is pumped to all parts of the
body.
• The Aorta, the largest artery in the body, is
responsible for directing the blood.
• The left ventricle is the strongest chamber with
the thickest walls to ensure that as the blood is
pumped it reaches all extremities.
Heart Valves