Topic 15Biology
B3.1 Gas exchange
Surfaces specialised for gas exchange in animals (alveoli) and plants (stomata and spongy mesophyll), and the diffusion gradients that drive them.
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Properties of good exchange surfacesSign up
Four properties of a good exchange surface · Maintaining the concentration gradient
30 min
Mammalian gas exchangeSign up
Alveoli and ventilation mechanics · Haemoglobin and the Bohr shift (HL)
35 min
Gas exchange in plantsSign up
Leaf tissues and stomata · Transpiration and stomatal density
30 min