Q1why do mammals and birds have four chambered heart whereas amphibian and reptiles have 3 chambered heart ?
Q2 How is exchange of gases carried out during breathing
Q3 Draw a diagram of heart and indicate the flow of blood in heart?
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answer 1
birds and mammals are warm blooded animals . they maintain a constant body temperature in a cooler enviroment . they warm their bodies for this purpose .
the animals require more oxygen to make it more efficient , it os necessary for them to seprate oxygenated and de- oxygenated bloos such that their circulatory system is more efficient and can maintain their constant body temperature.
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