Ventilation: Inspiration and Expiration

Just a couple of revision cards on Breathing in and out, :)

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  • Created by: hols_95
  • Created on: 25-11-12 18:12

Inspiration

INSPIRATION/INHALATION (Breathing in)

  •  Intercostal muscles and diaphragm contract
  • Ribcage moves upwards and outwards and diaphragm flattens
  • Volume of thorax increases, lung pressure decreases
  • Causes air to flow into the lungs

Inspiration is an active process which requires energy

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Expiration

EXPIRATION/EXHALATION (Breathing out)

  •  Intercostal muscles and diaphragm relax
  • The ribcage moves downwards and inwards and the diaphragm contracts
  • Thorax volume decreases, air pressure increases
  • Air is forced out of the lungs

Expiration is a passive process - it does not require energy

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Comments

Hummi C

It's really good, but you might need to go into a bit more depth for the exam :')

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