Question

Please describe the flow of blood through the heart. Please include all structures over/through which blood would pass.

Answer 1

Answer

• Begining with right atrium, deoxygenated blood from right atirum flows into right ventricle via tricuspid valve.
• From right ventricle deoxygenated blood is pumped into the pulmonary trunk by pulmonary semilunar valve.
• Pulmonary trunk divides into pulmonary arteries that leads to lungs.
• Deoxygenated blood entering the lungs is purified by gaseous exchange. Oxtgen molecules diffuse out of the alveoli and moved into blood in pulmonary capillaries.
• The blood at the end of pulmonary capilllaries become oxygen-rich blood.
• This oxygenated blood is carried by pulmonary veins back to the heart in left atrium.
• From left atrium, oxygenated blood flows into left ventricle via bicuspid valve.
• From left ventricle oxygenated blood is pumped into the aorta by aortic semilunar valve.
• Aorta branches into systemic arteries to supply oxygen-rich blood to all the organs of the body.
• After gaseous exchange at tissue level, the blood at the end of systemic capillaries become deoxygenated.
• Deoxygenated blood is collected by venules and systemic veins.
• Systemic veins from upper body drains into superior vena cava. Systemic veins from lowe body drains into inferior vena cava.
• Both the vena cavae drains deoxygenated blood into right atrium.