CBSE Class 10 Answered
1. What is the impact of leakage of blood upon the pressure of blood in the blood vessels? How is this prevented?
2. what is the basic difference b/w the transport systems of plants and animals?
3. how do some amphibians allow mixing of oxygenated and deoxygenated blood? why is it necessary to prevent this mixing in humans and birds?
Asked by A M | 18 Aug, 2010, 07:40: PM
Expert Answer
Blood flow will increase upon the pressure of blood in the blood vessels. The oxygenated blood flowing through the artery doesnot have any impact as the arteries are thick walled, highly elastic blood vessels having narrow lumen and no valves.
Amphibians have three chambered heart, two auricles and one ventricle, hence allow some mixing of oxygenated and deoxygenated blood.
Warm-blooded animals such as birds and mammals maintain a 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. It is therefore necessary to separate oxygenated and deoxygenated blood to maintain efficient supply of oxygen into the body. Hence, these animals require more oxygen (O2) for more cellular respiration so that they can produce more energy to maintain their body temperature.
Answered by | 19 Aug, 2010, 11:16: AM
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