______ chambered heart helps in the separation of the right side and the left side of the heart and is useful in mammals and birds.

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Solution

The heart of mammals and birds is four-chambered. These animals are warm-blooded and their metabolism is quite complex. These conditions require a constant supply of oxygen. Without proper separation of the chambers of the heart, oxygenated blood can mix with deoxygenated blood which can cause problems in these complex animals. Therefore, these animals have four-chambered hearts.

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Q. The heart of mammals and birds is four-chambered, while fishes have two-chambered hearts and amphibians and reptiles have three-chambered hearts. The hearts of birds and mammals are:

The advantage of separate chambers in heart of mammals and birds is ……...

Q. Assertion: Mammals and birds are warm blooded organisms which maintain a uniform internal body temperature.
Reason: Mammals and birds have a four-chambered heart.

Q. Match the following:

\begin{matrix} (i) A m p h i b i a n s a n d m o s t r e p t i l e s & A . 2 - c h a m b e r e d h e a r t (i i) B i r d s a n d m a m m a l s & B . 3 - c h a m b e r e d h e a r t (i i i) F i s h & C .4 - c h a m b e r e d h e a r t \end{matrix}

Match the following:
$\begin{matrix} (i) Amphibians and most reptiles & A. 2-chambered heart (ii) Birds and mammals & B. 3-chambered heart (iii) Fish & C.4-chambered heart \end{matrix}$

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