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Explain the main roles of the kidneys and skin

The kidney and skin works to protect our organs from the sun.
The kidneys and skin are necessary to remove waste products that the body produces.
The kidney and skin is used to keep our body warm.
The kidney and skin only work together to filter the liquid part of blood.

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Answer:

B

Explanation:

The kidneys and skin are necessary to remove waste products that the body produces.

(Because we sweat, which is a waste product)

Answer:

B

Explanation:

B is the answer because kidney, skin, lungs, large intestine all of them are used for the excretion i.e. the removal of waste products.

Now you could be confused why not option D that is because the skin also do other functions i.e. Protection against pathogens, sensation etc.

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