80287
Description
Mind Map by elliesussex, updated more than 1 year ago
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Created by elliesussex
almost 11 years ago
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B3.1.5 Ventilating the lungs
- Contain the exchange
surface of the
breathing system.
- Lungs in the thorax
- Inside the ribcage
- above the diaphragm
- seperates lungs from abdomen
- seperates lungs from abdomen
- Inside the ribcage
- When we breathe in:
- Intercoastal muscles (between ribs and diaphragm) contract
- Ribcage moves up and out
- Diaphragm flattens
- volume of the thorax increases
- Pressure of thorax decreases and air is drawn in
- Intercoastal muscles (between ribs and diaphragm) contract
- When we breathe out:
- Intercoastel muscles relax
- Ribcage moves down and in
- diaphragm becomes domed
- volume oh thorax decreases
- pressure increases and air is forced out
- Intercoastel muscles relax
- Movement in and out of
lungs is known as
ventilation
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