Specialised exchange surfaces

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Why do multicellular organisms need exchange surfaces?
Because all ceels need substances like oxygen and glucose
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What special features to exchange surfaces have to improve their efficiency
Large surface area, thin, god blood supply and ventilation
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Example of an exchange surface with a large surface area
Root hair cells, increases the rate of absorption of water
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Example of an exchange surface which is thin
Alveoli, single layer of thin flat cells, decreases the distance that the diffusion has to take place on
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Example of an exchange surface with a good blood supply and ventilation
Alveoli, large capillary network and lungs are ventilated/ Fish gills, capilaries, fresh water constantly means good ventilation
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Other cards in this set

Card 2

Front

What special features to exchange surfaces have to improve their efficiency

Back

Large surface area, thin, god blood supply and ventilation

Card 3

Front

Example of an exchange surface with a large surface area

Back

Preview of the front of card 3

Card 4

Front

Example of an exchange surface which is thin

Back

Preview of the front of card 4

Card 5

Front

Example of an exchange surface with a good blood supply and ventilation

Back

Preview of the front of card 5

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