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Question : 27
Total: 30
(a) Write the correct sequence of steps followed during journey of oxygen rich blood from lungs to various organs of human body.
(b) What happens when the system of blood vessels develop a leak?
(b) What happens when the system of blood vessels develop a leak?
Solution:
(a) (i) Oxygenated blood from lungs enters through the pulmonary vein into left atrium.
(ii) The left atrium relaxes while collecting the oxygenated blood. Then the left atrium contract and the blood goes into left ventricle.
(iii) The left ventricle relaxes while receiving the oxygenated blood then it contracts and the blood flows into different organs and parts of the body.
(iv) The deoxygenated blood from different parts of the body enters the right atrium through superior and inferior vena cava.
(v) The right atrium contract and the blood flows into right ventricle.
(vi) The right ventricle relaxes while receiving the deoxygenated blood then it contracts and the blood flows into lungs for oxygenation through pulmonary artery.
(b) Leakage would lead to a loss of pressure which would reduce the efficiency of the pumping system. To avoid this, the blood has platelet cells which circulate around the body and plug these leaks by helping to clot the blood at these points of injury.
(ii) The left atrium relaxes while collecting the oxygenated blood. Then the left atrium contract and the blood goes into left ventricle.
(iii) The left ventricle relaxes while receiving the oxygenated blood then it contracts and the blood flows into different organs and parts of the body.
(iv) The deoxygenated blood from different parts of the body enters the right atrium through superior and inferior vena cava.
(v) The right atrium contract and the blood flows into right ventricle.
(vi) The right ventricle relaxes while receiving the deoxygenated blood then it contracts and the blood flows into lungs for oxygenation through pulmonary artery.
(b) Leakage would lead to a loss of pressure which would reduce the efficiency of the pumping system. To avoid this, the blood has platelet cells which circulate around the body and plug these leaks by helping to clot the blood at these points of injury.
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