Explain the working of human heart with diagram
Answers
Explanation:
Kindly refer the attachment....
The right atrium receives blood into the heart. In diagrams like the one below, this is the one on the top left of the image. This blood is deoxygenated as it has supplied it’s oxygen to where it is needed by our tissues and organs. It enters the right atrium of the heart via two large veins, the superior and inferior vena cava.
From the right atrium, the blood travels down into the right ventricle through the tricuspid valve. Valves in the heart prevent blood from flowing backwards.
From the right ventricle, the blood is pumped upwards to the lungs through the pulmonary arteries, passing through the pulmonary valve.
Diagram of the human heart
CC BY-SA
In the lungs, our blood picks up oxygen, which we call oxygenated blood. The contraction of the right ventricle is not strong enough to send the oxygenated blood all around the body after the lungs, so the oxygenated blood needs to return to the heart for another pump.
Entering the heart through the pulmonary veins, oxygenated blood comes into the left atrium. Continuing down through the mitral valve, it passes to the left ventricle.
From the diagram above, you can see that the muscle of the left ventricle (pictured in pink) is thicker than that of the right ventricle. This is because of the additional force needed to pump blood around the whole body rather than just the lungs.
From the left ventricle, blood passes through the aortic valve, and exits the heart via the aorta. The aorta is a very important blood vessel, accommodating high pressure blood from the heart. The aorta has elastic properties, allowing it to expand as higher pressure blood passes through, then contract passively.
From the aorta, the blood travels through smaller arteries and capillaries to reach all parts of our body. Returning through veins, the now deoxygenated blood returns to the vena cava, and the journey begins again.
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