Question

Explain the mechanism of working of human heart 0

Answer 1

The heart has superior and inferior vena cava. They carry deoxygenated blood from the upper and lower regions of the body respectively and supply the deoxygenated blood to the right auricle of the heart.The right ventricle contracts and passes the deoxygenated blood into the two pulmonary arteries, which pumps it to the lungs where the blood is oxygenated. From the lungs, the pulmonary veins transport the oxygenated blood to the left atrium of the heart.The left atrium contracts and through the auriculo-ventricular aperture (bicuspid valve), the oxygenated blood enters the left ventricle.The blood passes to aorta from the left ventricle. The aorta gives rise to many arteries that distribute the oxygenated blood to all the regions of the body. Since the blood goes twice through the heart, it is known as double circulation.

Answer 2

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The heart is a muscular organ. It has different chambers to prevent the mixing of Oxygenated and De-oxygenated blood. The blood containing carbon dioxide has to reach the lungs to remove carbon dioxide and the oxygenated blood from the lungs has to brought back to the heart and then pumped to the rest of the body.

$\underline{Different\: parts\: of\: heart\:are:-}$

⏩ Left Atrium

⏩ Left Ventricle.

⏩ Right Atrium.

⏩ Right Ventricle.

⏩ Pulmonary arteries.

⏩ Pulmonary veins.

⏩ Upper Vena Cava.

⏩ Lower Vena Cava.

⏩ Septum.

⏩ Aorta.

$\huge\mathfrak{Working \:of \:heart}$

⭕️ Oxygenated blood from the lungs comes to the thin walled upper chamber of the heart on the left, the left atrium.

⭕️ The left atrium relaxed when it is collecting this blood. It then contrast, while the next chamber, the left ventricle, expands, so that the blood is transferred to it.

⭕️ When the muscular left ventricle contracts in its turn, the blood is pumped out to the body.

✔️ De-oxygenated blood comes from the body to the upper chamber on the right, the right atrium, as it expands.

✔️ As the right atrium contracts, the ventricle collects the blood.

✔️ Then this blood it pumped into the lungs for oxygenation.

✔️ Then it is brought back to heart and then pumped to the rest of the body.

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