The structures that an animal uses to exchange gases with its surroundings make up the:
A.) digestive system
B.) respiratory system
C.) excretory system
D.)circulatory system
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My answer: B.)
Agree
To determine the correct answer, let's break down the question and analyze the options provided.
The question asks about structures used by an animal to exchange gases with its surroundings. This process refers to the exchange of oxygen and carbon dioxide, known as respiration. Therefore, we can eliminate options A (digestive system), C (excretory system), and D (circulatory system) since they do not directly relate to gas exchange.
Option B states the respiratory system, which is the correct answer. The respiratory system in animals includes various structures such as lungs or gills, which allows for the exchange of gases between the animal and its environment.
Therefore, the correct answer is B.) respiratory system.