Breathing ~ The Human Lungs {EXPIRATION - breathing out}

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  • Created by: emilyowl
  • Created on: 14-04-16 10:09
What is expiration?
The largely active process, which means that is doesn't require much energy, process of breathing out.
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What do the internal intercostal muscles and the external intercostal muscles do during expiration?
The internal intercostal muscles contract and the external intercostal muscles relax.
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What movement happens to the ribs during expiration?
The ribs move downwards and inwards.
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What happens to the volume of the thorax during expiration?
The volume of the thorax decreases.
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What happens to the diaphragm during expiration? And why?
The diaphragm relaxes and is pushed upwards by the contents of the abdomen that was compressed during inspiration.
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What happens as a result of the volume of the thorax during expiration?
The decreased volume of the thorax increases the pressure of the lungs.
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Compare the pressure in the atmosphere and in the lungs during expiration.
The atmospheric pressure is lower than the pulmonary pressure in the lungs.
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What happens as a result of the different pressures in expiration?
Air is forced out of the lungs into the atmospheric air.
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How is air got out of the lungs during normal/quiet breathing?
The recoil of the elastic tissue in the lungs is the main cause of air being forced out.
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How does air leave the lungs during strenuous breathing (during exercise)?
Some other various muscles play a major part.
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Other cards in this set

Card 2

Front

What do the internal intercostal muscles and the external intercostal muscles do during expiration?

Back

The internal intercostal muscles contract and the external intercostal muscles relax.

Card 3

Front

What movement happens to the ribs during expiration?

Back

Preview of the front of card 3

Card 4

Front

What happens to the volume of the thorax during expiration?

Back

Preview of the front of card 4

Card 5

Front

What happens to the diaphragm during expiration? And why?

Back

Preview of the front of card 5
View more cards

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