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the middle part of the mammalian small intestine.
the process whereby substances dissolved in the blood (such as H+ ions, nitrogenous waste and...
when the entire heart, both of the atria and ventricles, is relaxed.
the first part of the intestine, from the pyloric valve of the stomach to the caecum. It...
a series of numbers that represents the types and arrangement of the teeth of a mammal.
competition between organisms of different species.