Inhaling and exhaling

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  • Created by: Steff06
  • Created on: 11-04-16 11:36
What is the 1st step in inhalation?
Diaphragm contracts to become flatter and pushes digestive organs down.
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What happens after the diaphragm contracts?
External intercostal muscles contract to raise ribs.
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What happens after ribs are raised?
Volume of chest cavity increases.
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What is the next stage after the volume of chest cavity increases?
Pressure in chest cavity drops below atmospheric pressure.
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What happens after the pressure drops?
Air moves into the lungs.
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What is the 1st stage in exhalation?
Diaphragm relaxes and is pushed up by displaced organs underneath.
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What happens after the diaphragm relaxes?
External intercostal muscles relax and ribs fall.
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What happens after intercostal muscles relax?
Volume of chest cavity decreases.
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What is the next stage after the volume of chest cavity decreases?
Pressure in lungs increases and rises above atmospheric pressure.
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What happens after the pressure in the lungs increases?
Air moves out of the lungs.
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Other cards in this set

Card 2

Front

What happens after the diaphragm contracts?

Back

External intercostal muscles contract to raise ribs.

Card 3

Front

What happens after ribs are raised?

Back

Preview of the front of card 3

Card 4

Front

What is the next stage after the volume of chest cavity increases?

Back

Preview of the front of card 4

Card 5

Front

What happens after the pressure drops?

Back

Preview of the front of card 5
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