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Structures of the Excretory System Cells produce wastes such as salts, carbon dioxide, and ammonia. For homeostasis to be maintained, these wastes need to be removed from the body. Excretion is the process by which metabolic wastes are elimiNted from the body.

- The skin excretes excess water, salts, and a small amount of urea in sweat.
- The lungs excrete carbon dioxide and water vapor.
- The liver converts potentially dangerous nitrogen wastes to urea.
- The kidneys are the major organs of excretion. They remove excess water, urea, and metabolic wastes from the blood. Ureters carry urine from the kidneys to the uriNry bladder, where it is stored until it leaves the body through the urethra.
1. Why does the body need an excretory system?

User Ashish Awaghad
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Answer:

okay lets go.

Step-by-step explanation:

A body needs an excretory system because:

Withouts the excretory system the wastes such as sweats ,urea will be continously collects in the body and they are harmful therefore can cause death.

User Ivan Samygin
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