The excretory system disposes of waste material, like excess liquid and heat energy, from the body. When we talk about the excretory system, we’re usually referring to the urinary system, which gets rid of liquid waste, or urine. The main organs involved in the excretory system are the kidneys. However, the lungs and the skin are also part of the excretory system because they also dispose of bodily wastes. The respiratory system excretes carbon dioxide, and sweat is excreted through the skin. The process of sweating gets rid of excess heat from the body since the body cools down as the sweat evaporates.

Question

The respiratory system is part of the excretory system because it

A
disposes of bodily wastes.

B
excretes liquid waste dioxide.

C
excretes sweat through the skin.

D
involves the kidneys.

Answer 1

The correct answer is:

A - disposes of bodily wastes.

The respiratory system excretes carbon dioxide, which is a bodily waste product.