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The tidal range is the vertical difference between the high tide and the succeeding low tide. Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth.
â¢ Tidal volume (V T). The tidal volume is the amount of air inspired (or expired) during normal tidal breathing. At rest, tidal volume in healthy adult men is approximately 500 ml, and about 400 ml in women. Tidal volume increases with activity to accommodate increased need for gas exchange.