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164060
Gas Exchange
Description
GCSE Biology (Gas Exchange) Mind Map on Gas Exchange, created by 9arush on 11/08/2013.
No tags specified
biology
gas exchange
biology
gas exchange
gcse
Mind Map by
9arush
, updated more than 1 year ago
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Created by
9arush
about 11 years ago
176
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0
Resource summary
Gas Exchange
Keywords
Ventilation
Bringing in fresh air & removing stale air.
Maintaining concentration gradient
Gas Exchange
Process of swapping one gas for another
Occurs in alveoli - where there are capillaries & tissues
Respiration
The production of ATP
Occurs in the cytoplasm & mitochondria of cells
The Mechanics of breathing
Breathing in ( Inspiration)
External intercostal muscles contract
Ribs move upwards & outwards
Diaphragm contracts & moves down
Volume in chest increases
Air rushes into lungs & they inflate
Pressure decreases lower than atmospheric pressure
Breathing out (Expiration)
External Intercostal muscles relax
Ribs move downwards & inwards
Diaphragm relaxes & moves upwards
Volume in chest decreases
Air rushes out of lungs & they deflate
Pressure increases higher than atmospheric pressure
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