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- The mitral valve (or bicuspid valve) separates the left atrium and left ventricle. Its function is to close as the heart contacts (i.e. when pressure increases in the ventricle) to prevent blood...

- An incredible diagram on bacteriology. Remember a lot of hard details quickly and easily!

- Abdominal aneurysm of aorta secondary to atherosclerosis.

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- A labelled schematic of a typical vertebra of the spinal column.