The respiratory system is composed of airways, lungs, blood vessels, and muscles working together to supply oxygen to all parts of your body. The diaphragm, a muscle located beneath the lungs, plays an important role. When you inhale, the diaphragm squeezes, or contracts, and moves downward. As a consequence, there is more room for the lungs to expand as they fill with air. When you exhale, the diaphragm relaxes and moves upward, which leads to air being pushed out of the lungs.

Question

Match causes with their effects.
Air moves out of the lungs.
Air moves into the lungs.
Questions answered
30
Time elapsed
00
03
00
HR MIN SEC
SmartScore out of 100 0
37
Cause
The diaphragm contracts and moves downward.
The diaphragm relaxes and moves upward.

Answer 1

Here are the correct cause and effect matches regarding the diaphragm's actions during breathing:

• Cause: The diaphragm contracts and moves downward.
  Effect: Air moves into the lungs.

• Cause: The diaphragm relaxes and moves upward.
  Effect: Air moves out of the lungs.