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The alveolar epithelium is very thin, just one cell layer thick. This means the diffustion distance is small, therefore diffusion of gases occurs rapidly.

Remember that diffusion is the n...

We will go through dividing up the essay - explaining the content required in each section. It is always important to have a conceise introduction outlining your argument, with the conclusion relating ...

We initially have to define and understand key phrases used to analyse text, including metaphors, similies, pathetic fallacy, perconification, symbolism etc. 

We will put th...

The key elements which will help you achieve top marks in your IA are personal engagement, primary data, data manipulation and findings from other investigations similar. 

Start by defining the key economic terms which are used in the question. This is absolutely essential. After your definitions move on to the next paragraph. In the second paragraph you need to explain the...