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Science biology, (image, Kory), image, image, image, image, Having a large…
Science biology
key points
In multiceullar organisms, manyorgans are specialised with effective exchange surfaces.
exchange surfaces usually have a large surface area and thin walls. which give short diffusion distances. in animals, exchange surfaces will have an efficient blood supply or, for gaseous exchange, be ventilated
single celled organisms have a relatively large surface area to volume ratio so all necessay exchanges with the environment take place over this surface.
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In animals, having an efficient blood supply moves the diffusing substances away from the exchange surfaces and maintain a steep concentration (diffusion gradient
In animals, being Ventiladted makes gas exchange more efficient by maintaining steep concentration gradients.
surface area to volume ratio is very important and it makes a big difference to the way animals can exchange substances with the environment. surface area to volume ratio is also important when you consider how energy is transferred by living organisms and how water evaporates from the surfaces of plants and animals
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Having a large surface area over which exchange can take place, having a thij
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