Practice identifying the main parts and functions of the respiratory system and explaining how breathing supports the body.
Read each problem carefully. Answer in complete sentences and show your thinking when needed.
How the body takes in oxygen and removes carbon dioxide
Biology - Grade 6-8
- 1
What is the main job of the respiratory system in the human body?
- 2
List the path air follows as it enters the body through the nose or mouth and travels to the lungs.
- 3
What is the function of the trachea?
- 4
Explain what happens in the alveoli.
- 5
Why are alveoli well suited for gas exchange?
- 6
Describe the role of the diaphragm in breathing.
- 7
What is the difference between inhaling and exhaling?
- 8
How do the respiratory system and circulatory system work together?
- 9
Name two ways the nose helps prepare air before it reaches the lungs.
- 10
How can smoking damage the respiratory system?
- 11
A student says that the lungs are muscles that push air in and out. Explain why this statement is incorrect.
- 12
Why does your breathing rate usually increase during exercise?