Divide An imaginary line indicating the limits of a sub-basin, sub-watershed, or watershed, the boundary line along a topographic ridge or high point which separates two adjacent drainage basins. Also referred to as Ridge Lines. Diving Reflex A reflexive response to diving in many aquatic mammals and birds, characterized by physiological changes that decrease oxygen consumption, such as slowed heart rate and decreased blood flow to the abdominal organs and muscles, until breathing resumes. Though less pronounced, the reflex also occurs in certain non-aquatic animals, including human beings, upon submersion in water.
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Author of the Water Words Dictionary source of text: Gary A. Horton
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