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The three main kinds of valves in the human circulatory system are atrioventricular valves, semi-lunar valves and pocket valves. Atrioventricular...
Artificial classification is used to divide organisms by their characteristics, which can vary depending on the specific situation which you are considering. Features that are considered are known as anal...
The cardiac cycle, by convention, is considered to begin with depolarisation of the sino-atrial node (SAN). This depolarisation spreads across the two atria, causing the right and left atria to contract. ...
An atheroma is the deposition of fatty material in the innermost lining of an artery (caused by the process of 'atherosclerosis'). Atheromas have a tendency to rupture and this increases the likelih...
Simple diffusion - fatty acids and glycerol are lipophilic and hydrophobic, therefore can diffuse straight through the lipid bilayer membrane of the epithelial cells down the concentration gradient
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