Question

Explain our heart works as a double pump????

Answer 1

$\huge\mathfrak\red{HELLO}$

The heart is called a double pump because first it pump carries oxygen-poor blood to your lungs and second it pump delivers oxygen rich blood to every part of body.

Detailed explanation:

↪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 auricle contracts and passes the deoxygenated blood to the right ventricle.

 

  ↪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.

Answer 2

• when the muscles of all the four chambers of the heart are relaxed , the pulmonary vein brings the oxygenated blood from the lungs into the left atrium of the heart

• when the left atrium contacts , the oxygenated blood is pushed into the left ventricle through the valve v1

• when the left ventricle contracts ,the oxygenated blood is forced into the  main artery called " aorta ". this main artery then branches into smaller arteries which go into different body organs . the smaller arteries further branch into capillaries .

• the main artery carries blood to all the organs of the body . when oxygenated blood passes through the capillaries of the organs , then it gives oxygen to the body cells . since the blood lose oxygen here , we say that blood has been deoxygenated .

• when the right atrium contracts , deoxygenated blood is pushed into the right ventricle through the valve v2 .

• and when the right ventricle contracts , the deoxygenated blood is pumped into the lungs through the pulmonary artery . in the lungs , deoxygenated blood releases its carbon dioxide and absorbs fresh oxygen from air . so , the blood becomes oxygenated again . this  oxygenated  blood is again sent to the left atrium of heart by pulmonary vein for circulation in the body .

This is the double circulation in the body

hope it helps u