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Exchange of materials.
There are four main points you need to include in a diffusion/ cell adaptation question...
1. Large surface area either through villi or bioconcave disc shape, a large surface area means more
space for diffusion.
2. Rich blood supply this makes sure that a steep concerntration gradient…

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remember the heart is a pump, and beats around 70 times a minute to supply oxygen to your body, and
also to carry waste away through the blood. The heart uses cardiac muscle, which is very thick and
strong to push the blood around the body.

The Blood.
There are…

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When photosynsasis is faster, so is transpiration, because the stomata has to open and close more
often.The fastest conditions is warm, sunny, windy, dry conditions for transpiration.
Plants in warm and dry conditions have adapted so that they only open the stomata slightly during the
day, but alot at night,…

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Cheese is formed in a similar way, a different starter culture is added to warm milk, and the bacteria
again starts to break down the lactose to form lactic acid, but this time alot more lactic acid is produced.
This means that the curds are alot more solid than…

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2. It goes into the Bowman's capsule, where the soluble molecules, water, urea, ions and glucose are
pushed into the capsule, under high pressure, and the other molecules, which are too big, remain in the
blood, such as protein and blood cells. This process is called ultafiltration.
3. The waste…

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4. Overall, the dialysis machine makes sure that the blood is filtered, so that it keeps the usefull
things, and gets rid of the toxic substances.

Many patients have to have dialysis 3 times a week, and it can take as long as 8 hours to complete.

Biogas generators.


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