Question

what organs are the principal organs of exeraton​

Answer 1

Answer:

They include the large intestine, liver, skin, and lungs. All of these organs of excretion, along with the kidneys, make up the excretory system...

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Answer 2

Answer:

KIDNEY ,SKIN and many more.

Explanation:

But KIDNEY is the core organ in exertion.

And structural and functional unit of kidney is nephron.

The kidney will eliminate toxic urea and little amount of NH3 by  urine.