Question

assertion mammels and birds have four chambered heart
reason mammels and birds are warm blooded​

Answer 1

Explanation:

yes your answer is very much true

Answer 2

Answer:

Both A and R are true and R is the correct explanation of the assertion.

Explanation:

i) Mammals and birds are warm-blooded organisms with four-chambered      hearts as they have high energy needs to maintain their body temperature.

ii) They must have a four-chambered heart to separate oxygenated and de-oxygenated blood, so their circulatory system is more efficient and maintains their constant temperature.

iii) The four-chambered heart has a distinct advantage over simpler structures: It allows us to send our "dirty" blood to the cleaners-the lungs-and our "clean" blood to the rest of the body without mixing the two.

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