diffusion

?
what 3 factors effect the rate of diffusion?
-temperature
-concentration gradient
-surface area
1 of 5
why are the lungs a goof exchange surface?
-alveoli have a large surface area
-they're only one cell thick which gives them a short diffusion pathway
-breathing makes them well ventilated
-surrounded by blood vessels which creates a high concentration gradient
2 of 5
why are the intestines a good exchange surface?
-villi have a large surface area
-rich blood supply
-wall is only one cell thick
3 of 5
why are gills good exchange surfaces?
-water rushing over them causes ventilation
4 of 5
what are two exchange surfaces in plants?
-roots
-leaves
5 of 5

Other cards in this set

Card 2

Front

why are the lungs a goof exchange surface?

Back

-alveoli have a large surface area
-they're only one cell thick which gives them a short diffusion pathway
-breathing makes them well ventilated
-surrounded by blood vessels which creates a high concentration gradient

Card 3

Front

why are the intestines a good exchange surface?

Back

Preview of the front of card 3

Card 4

Front

why are gills good exchange surfaces?

Back

Preview of the front of card 4

Card 5

Front

what are two exchange surfaces in plants?

Back

Preview of the front of card 5

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