Oxidation, how does it work? Oxidation is a chemical reaction that takes place in the presence of oxygen. You can see it when you cut an apple: once cut, the apple tends to turn brown because one of its enzymes reacts with oxygen and transforms a molecule (called phenol) into another molecule (called quinone) which […]
Immune System: how does it work against an infection ?
A short introduction to the function of our immune system What is a pathogen ? Bacteria are organisms constituted of one cell (size in µm: one millionth of a meter) and are able to grow and reproduce. Viruses are smaller (size in nm: one billionth of a meter) and are constituted of an envelope with […]
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