Question

Explain working of heart?

Answer 1

✔️✔️✔️️heart is divided into four chambers:-

➖right auricle
➖ right ventricle
➖left auricle
➖ left ventricle.

⭕️The walls of the chambers are made up of a special muscle which contracts continuously and rhythmically to distribute blood to all the body cells.



✔️✔️✔️Working of heart

⭕️The heart has superior and inferior vena cava which carry deoxygenated blood from the upper and lower regions of the body 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 blood passes to aorta from the left ventricle.


⭕️The left atrium contracts and the oxygenated blood enters the left ventricle.


⭕️ The aorta gives rise to many arteries that distribute the oxygenated blood to all the regions of the body. 

⭕️here since the blood goes twice through the heart, it is known as "double circulation".



$\huge\bf{\boxed {\red{\mathfrak{thank \: you :)}}}}$

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Answer 2

$\huge\mathfrak{Question :}$

Explain working of heart ?


$\huge\mathfrak\red{Answer :}$

$\underline{\underline{\textbf{Working of Human Heart :}}}$

→ First of all, all the deoxygenated blood from the body with the help of superior and inferior vena cava came in heart. 

→ After it, it came in Right atrium and then Right ventricle.

→ Contraction of auricles derives most of the blood in into the ventricle. At the end of the auricular systole, auricles start relaxing and the contraction of the ventricles simultaneously.

→ As the contraction of the ventricles begins, the pressure of the blood in the auricles rises. With this pressure, the flaps of the auricular ventricular (A-V) valves are pushes up and meet to close the A-V apertures. This tight closure of the A-V valves at the start of the ventricular contraction produces the first heart beat, which is "Lub".

→ Now the ventricles start relaxing. The semilunar valve close as they get filled the blood trying to return and meet together, closing the outlets of the great arteries. 

→ The closing of the semilunar valves at the start of diastole produces the second heart sound "Dup".
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