These structures have been installed and operated for a number of reasons: 1  locks allow navigation on large rivers to facilitate boating traffic. 2  weirs create pool environments for diversion into irrigation channels, for pump intakes, recreational boating and swimming, and other aesthetic reasons.
Medical Definition of carbohydrate. : any of various neutral compounds of carbon, hydrogen, and oxygen (as sugars, starches, and celluloses) most of which are formed by green plants and which constitute a major class of animal foods.
Carbohydrates provide your body with the glucose it needs to function properly. There are two types of carbohydrates: complex and simple. Foods rich in complex carbohydrates and fiber are called good carbohydrates. Simple carbohydrates include foods with added sugars -- these are called bad carbohydrates.oods rich in complex carbohydrates and fiber are called good carbohydrates. Simple carbohydrates include foods with added sugars -- these are called bad carbohydrates.