The right atrium receives blood from the great veins - the SUPERIOR AND INFERIOR VENA CAVA
Blood passes from the RIGHT ATRIUM through the TRICUSPID VALVE to the right ventricle.
From the RIGHT VENTRICLE it is pumped through the PULMONIC VALVE & PULMONARY ARTERIES to the LUNGS.
In the lungs carbon dioxide is removed from the blood and oxygen is picked up.
Through the PULMONARY VEINS oxygenated blood returns to the LEFT ATRIUM.
From the left atrium the blood passes through the BICUSPID OR MITRAL VALVE to the LEFT VENTRICLE.
As the left ventrical contracts, the pressure closes the mitral valve.
The AORTIC VALVE opens allowing blood to leave the heart via the main blood vessel called the AORTA.
When this cycle is complete, the aortic valve closes to prevent blood from dropping back into the heart.
The heart is two separate pumps that work together.
Oxygenated and nutrient rich blood is pumped around the body. (lungs, liver, kidneys, tissues and gut)
Deoxygenated blood which contains waste products is returned to the lungs to allow the entire cycle to begin again.