What is the path of blood in systemic circuit from heart to kidneys and heart?

The path of blood in the systemic circuit from the heart to the kidneys and back to the heart is as follows:

1. Heart (left ventricle): The oxygenated blood is pumped out of the left ventricle of the heart through the aortic valve into the aorta, the largest artery in the body.

2. Aorta: The aorta carries oxygenated blood to various organs and tissues throughout the body, including the kidneys.

3. Renal arteries: The aorta branches into smaller arteries, called renal arteries, which supply blood to the kidneys.

4. Kidneys: The renal arteries enter the kidneys and divide into smaller vessels, called arterioles, which further branch into capillaries. The capillaries form a network around the functional units of the kidneys, called nephrons, where the exchange of substances occurs between the blood and the surrounding tissues.

5. Renal veins: The capillaries reunite to form small veins, which merge to form larger veins called renal veins. The renal veins carry deoxygenated blood, along with waste products, away from the kidneys.

6. Inferior vena cava: The renal veins merge to form a single large vein called the inferior vena cava. The inferior vena cava carries deoxygenated blood from the lower part of the body (below the diaphragm), including the kidneys, back to the heart.

7. Heart (right atrium): The inferior vena cava enters the heart through the right atrium. The deoxygenated blood from the kidneys and other parts of the body empties into the right atrium.

8. Right ventricle: The blood then flows from the right atrium into the right ventricle through the tricuspid valve.

9. Pulmonary arteries: The right ventricle pumps the deoxygenated blood out through the pulmonary valve and into the pulmonary arteries, which carry the blood to the lungs for gas exchange.

10. Lungs: In the lungs, the deoxygenated blood releases carbon dioxide and picks up oxygen, becoming oxygenated.

11. Pulmonary veins: The oxygenated blood from the lungs returns to the heart through the pulmonary veins. The pulmonary veins enter the left atrium, completing the systemic circuit and bringing the blood back to the starting point.

12. Left ventricle: The oxygenated blood in the left atrium flows into the left ventricle, ready to be pumped out to the body again, repeating the systemic circuit.