7 Questions
During inspiration, the ______ contracts moving down.
diaphragm
The ribs move up and out as the ______ muscles contract.
intercostal
As a result, air is drawn into the lungs through the ______.
trachea
During exhalation, what happens to the diaphragm?
The diaphragm relaxes and flattens.
What happens to the ribs during exhalation?
The ribs move down and in.
What happens to the cavity around the lungs during inspiration?
The cavity around the lungs increases.
What happens to air pressure during exhalation?
Air pressure increases.
Study Notes
Inspiration
- Diaphragm contracts, moving down
- Ribs move up and out due to intercostal muscles contraction
- Cavity around lungs increases, reducing air pressure
- Air is drawn into lungs through trachea, causing them to inflate
Exhalation
- Diaphragm relaxes and flattens
- Ribs move down and in as intercostal muscles relax
- Cavity around lungs decreases, increasing air pressure
- Air is forced out of lungs through trachea, causing them to deflate
Test your knowledge on the process of inspiration and how the diaphragm and intercostal muscles work together to draw air into the lungs. Learn about the changes in air pressure and the role of the trachea in lung inflation.
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