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a molecule that is formed when oxygen and haemoglobin combine chemically.
the process whereby water and small molecules dissolved in the blood are forced out of the...
organisms that are unable to produce their own organic food and must therefore obtain nutrients...
secretory tissue in the leaves of plants that secretes water through pores in the epidermis or...
chisel-shaped teeth found at the front of the mammalian jaw, used to bite and cut off pieces of...