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Firstly, the alveoli walls consist of a one-cell thick layer of squamous epithelium. This means there is a thin barrier to diffusion, and a small distance for oxygen molecules to diffuse across to get to ...

When writing an introduction, being concise and precise is key. Your introduction should contain no more than a couple of sentences, depending on the length of your essay. It should provide a very general...

Looking at this question the first thing we should notice is that there is a an x squared inside a bracket which is also squared. As there is function inside a function we must use the chain rule. The sim...

Looking at this equation you can see that it is in the form of y = mx + c and we know that this is the equation of a straight line. One way to solve this would be to inspect the equation and see that the ...

While there are various tenses to elaborate on the time frame in which an action takes place, there is also such a thing as a type of voice; active or passive. An active voice establishes the subject as p...