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CBSE Class 10 Answered

Q1.Why is it necessary to separate deoxygenated blood from oxygenated blood?(2 points; 2marks) Q2. Write the importance of double circulation in humans?(2 points; 2marks)
Asked by piyushmalik024 | 18 May, 2019, 10:16: AM
answered-by-expert Expert Answer
1.
(a)It is necessary to separate oxygenated and deoxygenated blood in mammals and birds because warm-blooded animals such as birds and mammals maintain constant body temperature by cooling themselves when they are in a hotter environment and by warming their bodies when they are in a cooler environment.
(b)Hence, these animals require more oxygen for more cellular respiration so that they can produce more energy to maintain their body temperature. Thus, it is necessary for them to separate oxygenated and de-oxygenated blood, so that their circulatory system is more efficient and can maintain their constant body temperature.
 
2. 
(a)Double circulation is important to keep the oxygenated and deoxygenated blood separate from each other in the body and prevent their mixing. Such separation allows a highly efficient supply of oxygen to the body. 
(b)Another advantage of a double circulatory system is that blood can be pumped to the rest of the body at a higher pressure.
Answered by Sivanand Patnaik | 18 May, 2019, 12:24: PM
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