Question

ce.
3. In mammals and birds why is it necessary to separate oxygenated and de-oxygena blood?
4. In human alimentary canal, name the site of complete digestion of various compo
the process of digestion.​

Answer 1

Answer:

PLZ MARK AS BRAINLIEST

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Answer 2

Answer:

3

Explanation:

In mammals and birds they both have a double circulation system unlike the fish which don't, where both the oxygenated and de-oxygenated blood are to be maintained separately it is so in that the circulatory system can be more efficient and also the organisms can maintain their constant body temperature