Question

explain the structure of heart in humans and it's functions.
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Answer 1

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Human heart is the main pumping organ, it comprises of four chambers the upper chambers are called auricle and atrium and the lower chambers are called ventricles

Auricles receive the blog and ventricles pump out of heart, Right side of heart deals with deoxygenated blpd and left side of heart deals with oxygenated blood

The atrium or auricle is thin walled as it supplies blood to ventricle only and ventricles are thick as they supply blood to lungs and body.

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Answer 2

Answer:

The human heart is comprised of four chambers, two atria(upper and smaller) and two ventricles (lower and larger). These chambers are divided into a right and left side, each with an atrium and a corresponding ventricle. The hearts function is that of a muscle pump. Oxygen rich blood is received from the lungs into the left atria from the lungs. This chamber fills to a particular pressure which opens the valve filling the left ventricle with blood. The left ventricle receives an electrical signal to squeeze and then pumps the blood out the aorta to the rest of the body so that all your organs and tissues are perfused with oxygen and nutrient rich blood. The deoxygenated blood returns to the right atrium of your heart via the inferior and superior vena cava( 2 large veins into which your smaller veins drain). This smaller upper chamber fills to a particular pressure which opens the valve filling the right ventricle with blood. The right ventricle receives an electrical signal to squeeze and then pumps the blood out the pulmonary artery to the lungs. The lungs oxygenate the blood and the cycle begins again.

Explanation: