1. Structure & Function Heart

2. Structure of Heart

3. Heart Chambers Top Chambers are the left and right atrium
Bottom Chambers are the left and right ventricles
~ atrium walls are thin because only needed to pump blood to bottom chambers

4. Structure & Function of the Heart
Right Side
~ receives deoxygenated blood from body
~ this side pumps this blood to the lungs through the pulmonary arteries
~ pulmonary arteries are the only arteries in body that contain blood that is low in oxygen
Left Side
~ receives oxygenated blood from the lungs
~ blood returns to heart from the lungs through the pulmonary veins
~ pulmonary veins are the only veins in body that contain blood high in oxygen
~this side pumps blood through left atrium & left ventrical to the body via the aorta

5. Superior Vena Cava~ large blood vessel that returns blood from the head, neck, and arms to the heart.
Inferior Vena Cava~ blood from lower body flows through this vessel to the heart
Pulmonary Artery-blood flows through this vessel from the heart to the lungs
Pulmonary Veins-blood flows through this vessel from lungs back to heart
Aorta~ The largest artery in the body, blood flows through this vessel to rest of body

6. Heart Valves
A system of valves prevent blood from moving backwards through the heart
Atrioventricular valves (AV valve) separate the atrium and ventrical
Semilunar valves (SL valve) separate ventricles from pulmonary artery and aorta
Semilunar Valve
(Pulmonary Valve)
Semilunar Valve
(Aortic Valve)
Atrioventricular Valve
(Bicuspid Valve)
Atrioventricular Valve
(Tricuspid Valve)

7. The Heartbeat
-SA node also known
as a pacemaker

8. Heart Sound Heart sounds caused by the closing of the valves
Creates “lub-dub” sound!
”lub” closing of AV valve
”dub” closing of SL valve
Semilunar Valve
(Pulmonary Valve)
Semilunar Valve
(Aortic Valve)
Atrioventricular Valve
(Bicuspid Valve)
Atrioventricular Valve
(Tricuspid Valve)