The normal flow of blood through the heart would be


right atrium → right ventricle → lungs → left atrium → left ventricle.

right atrium → left atrium → left ventricle → aorta.

lungs → right atrium → right ventricle → aorta.

right atrium → right ventricle → aorta → left atrium → left ventricle → lungs.

A?

Agree.

Based on the provided options, the correct answer is:

right atrium → right ventricle → lungs → left atrium → left ventricle.

To understand the flow of blood through the heart, it can be helpful to visualize it. Here's how it works:

1. Deoxygenated blood, which has already circulated through the body, enters the heart through the superior and inferior vena cava and flows into the right atrium.

2. From the right atrium, the blood moves to the right ventricle through the tricuspid valve.

3. The right ventricle pumps the deoxygenated blood to the lungs through the pulmonary artery.

4. In the lungs, the blood picks up oxygen and gets rid of carbon dioxide through the process of respiration.

5. Oxygenated blood then returns to the heart through the pulmonary veins and enters the left atrium.

6. From the left atrium, the blood moves to the left ventricle through the mitral valve (or bicuspid valve).

7. Finally, the left ventricle pumps the oxygenated blood out of the heart and into the aorta, the body's main artery, to be circulated throughout the body.

This continuous loop of blood flow is essential for delivering oxygen and nutrients to the body's organs and tissues while removing waste products.