Further Biology - Diffusion Through Cell Membranes

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Different parts of the body are adapted so that substances can diffuse through them most effectively

GAS EXCHANGE IN LUNGS:

JOB OF LUNGS

To transfer OXYGEN to the BLOOD  an to remove waste CARBON DIOXIDE from it

To do this the lungs contain millions of little air sacks called alveoli where gas exchange takes place

The alveoli are specialised to…

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