Carbohydrate carbohydrates, also known as carbohydrates, are the most widely distributed and most important organic compounds in the world. Glucose, sucrose, starch and cellulose are all carbohydrates. X0d carbohydrates are all organisms The main source of energy needed to sustain life activities is not only nutritious but also has special physiological activity, such as: heparin in the liver has anticoagulant effect; blood sugar in the blood type related to immune activity.In addition, the nucleic acid The carbohydrate compounds are more important for medicine, and the carbohydrate compounds are composed of three elements, C, H and O, And O is usually 2: 1, and the proportion of water molecules, which can be expressed by the general formula Cm (H2o) n.Therefore, these compounds have been called carbohydrates, but later found that some compounds according to their structure and (C6H12O5), deoxyribose (C5H10O4), etc .; and some compounds such as acetic acid (C2H4O2), lactic acid (C3H6O3), and other compounds, such as acetic acid (C2H4O2), lactic acid (C3H6O3) And its composition is consistent with the general formula Cm (H2o) n, but the structure and properties are completely different with the carbohydrate compounds, so the name of the carbohydrate is not exact, but for a long time, so far still in use. X0d from Chemical structures, carbohydrates are polyhydroxyaldehydes, polyhydroxy ketones, and their condensates.