Question 11(1 mark)SavedIn the human body, blood leaving the heart first goes to the lungs then travels around the body before returning to the heart.

The blood circulation in the human body is a continuous process and is carried out by the cardiovascular system. Here are the steps:

1. The process begins in the right atrium of the heart, where deoxygenated blood from the body is received.

2. This deoxygenated blood then moves into the right ventricle through the tricuspid valve.

3. The right ventricle pumps the blood to the lungs via the pulmonary artery. This is the only artery in the human body that carries deoxygenated blood.

4. In the lungs, the blood gets oxygenated, i.e., it gives up carbon dioxide (a waste product) and picks up oxygen.

5. This oxygenated blood then returns to the heart, entering the left atrium via the pulmonary veins. These are the only veins in the body that carry oxygenated blood.

6. The oxygenated blood then moves from the left atrium into the left ventricle through the mitral valve.

7. The left ventricle pumps the oxygenated blood to the rest of the body through the aorta, the largest artery in the body.

8. The oxygen in the blood is used by the body's cells, and the now deoxygenated blood returns to the heart, and the process begins again.

So, in summary, blood leaving the heart first goes to the lungs to get oxygenated, then travels around the body to deliver oxygen, and then returns to the heart to be pumped to the lungs again.