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* [[Biosynthesis]]: The multi-step, enzyme-catalyzed process by which the simple substances are converted into more co ...onchial tubes]]: The larger tubes that lead from the trachea to the lungs, branching into smaller tubes called bronchioles.

* [[Enzyme]] - a chemical, originating in a cell, that regulates reactions in the body ...group of cells or an organ that produces substances (such as hormones and enzyme) that are used by the body