Medicine High School

Imagine you are a tiny erythrocyte on its journey through the heart. In what order would pass through the following structures?

- left atria, right atria, left ventricle, right ventricle, pulmonary trunk, pulmonary artery vena cava, tricuspid valve, mitral valve, pulmonary veins, aortic valve, aorta, pulmonary valve, lungs.

Answers

Answer 1

The order that the erythrocyte will pass through will encompass the structures as shown below.

What is the erythrocyte?

As an erythrocyte traveling through the heart, you would pass through the following structures in the following order:

Vena cava: The deoxygenated blood from the body enters the right atrium through the superior and inferior vena cava.

Right atrium: The right atrium receives the deoxygenated blood from the vena cava.

Tricuspid valve: The tricuspid valve separates the right atrium from the right ventricle and prevents backflow of blood into the atrium.

Right ventricle: The right ventricle pumps the deoxygenated blood to the lungs.

Pulmonary valve: The pulmonary valve separates the right ventricle from the pulmonary trunk and prevents backflow of blood into the ventricle.

Pulmonary trunk and arteries: The deoxygenated blood travels through the pulmonary trunk and branches into the pulmonary arteries to reach the lungs.

Lungs: In the lungs, the erythrocytes receive oxygen and get rid of carbon dioxide.

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