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the muscles that occur between the ribs.
all the different ecosystems with their numerous and varied organisms.
rhythmical wave-like muscular contractions of a duct in order to cause movement of substances...
a molecule that stores large amounts of energy that can be used for metabolic activity.
two or more forms of a particular chemical element, that have the same number of protons in the...
the process of removing salt and other minerals from seawater, to make it drinkable.