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Question

Which of the following statements hold true for the process of waste removal in human beings?

A
Carbon dioxide is removed from the blood in lungs.
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B
Metabolic activities generate nitrogenous waste in our bodies.
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C
Blood capillaries are involved in the filtration of blood in kidney.
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D
Wastes are removed from the bodies only as urine.
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Solution

The correct options are
A Carbon dioxide is removed from the blood in lungs.
B Metabolic activities generate nitrogenous waste in our bodies.
C Blood capillaries are involved in the filtration of blood in kidney.
Various substances like carbon dioxide, urea, ammonia, salts, etc., are produced by our body. These substances are not required and it has to be removed. Lungs help in the removal of carbon dioxide by exhalation.

During metabolism a lot of waste is generated. Nitrogenous waste is one among the waste generated. If accumulated, it is toxic to the body and has to be removed out of the body.

Filtration of blood is done by the blood capillaries located inside the kidneys. They are very thin tube like structures

Animals excrete waste products in solid (digestive wastes), liquid (urine and sweat) and gaseous (carbon dioxide) forms.

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