SCIENCE
CIRCULATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It starts to clot
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It gets old and dirty flowing through the body
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The oxygen in it is replaced with carbon dioxide
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The farther blood is from the heart, the more dark red it is.
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Detailed explanation-1: -O2 is consumed by the tissue to release energy and CO2 is released into the blood which makes it dark.
Detailed explanation-2: -The iron-containing complex protein known as haemoglobin is present in red blood cells (RBC). The haemoglobin contains red-colored compound heme, because of which the blood looks red in color. This heme compound helps in transporting oxygen in our blood.
Detailed explanation-3: -The blood that flows through the lungs into the heart is arterial blood. It has a bright red colour because it contains oxygen. While the blood which flows to the lungs is venous blood. It has a dark red colour because it contains carbon dioxide.
Detailed explanation-4: -Human blood is red because hemoglobin, which is carried in the blood and functions to transport oxygen, is iron-rich and red in color. Octopuses and horseshoe crabs have blue blood. This is because the protein transporting oxygen in their blood, hemocyanin, is actually blue.
Detailed explanation-5: -Blood is a significant part of transport system in our body, and we need blood for the following reasons: It transports substances like digested food from the small intestine to the other parts of the body. It carries oxygen from the lungs to the cells of the body. It also helps in removal of wastes from the body.