Explanation:
Carbon dioxide. This is a by-product of cellular respiration excreted through the lungs. If allowed to accumulate in the body, the pH of blood would decrease and the acidity would result to denaturing of proteins hence threatening life.
Urine & sweat. Urine contains excess water, bicarbonates and H+ ions, and other metabolites from the breakdown of biomolecules and other toxic compounds. If allowed to accumulate in the body, the normal physiological processes of the cells would be hampered due to toxicity leading to a threat to life.
Feces. This is the excretion of undigested food passing through the gut. Accumulation of undigested food in the alimentary canal would block passage of food hence also hamper the absorption of essential elements into the body.
Learn More:
For more on waste removal from the body check out;
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