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blood vessels that transport deoxygenated blood from the heart to the lungs.
the destruction of a donated organ by the immune system of the recipient.
a species that has a large effect on its environment relative to its abundance and plays an...
dietary supplements of live bacteria that are good for human health.
a molecule found inside red blood cells that can carry both oxygen and carbon dioxide.
moulds that generally infect the leaves of many plants, including crop plants, such as wheat and...