Question

Why Do we have four chambered heart​

Answer 1

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$\huge{\boxed{\boxed{\mathbb{\red{Heart}}}}}$

It allows us to send our "dirty" blood to the cleaners-the lungs-and our "clean" blood to the rest of the body without having to mix the two. That system is very efficient. The blood coming from the left side of the heart is pure, fully oxygenated, and ready to fuel the muscles. A fish heart, on the other hand, has to pump blood, which is only half as pure, to the body because it doesn't have separate chambers that enable it to clean the blood in one cycle and distribute it in the next.

Answer 2

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Dark reaction

Dark reactions do not need sunlight and occur in absence of sunlight

Dark reactions use the energy molecules.

It is mainly generated during the light reaction.

Thank you ❤