Columbia Encyclopedia

(Encyclopedia)  CE5 Digestive system digestive system, in the animal kingdom, a group of organs functioning in digestion and assimilation of food and elimination of wastes. Virtually all animals have a digestive ...

(Encyclopedia) Chinese examination system, civil service recruitment method and educational system employed from the Han dynasty (206 b.c.–a.d. 220) until it was abolished by the Ch'ing dowager empress Tz'u Hsi in...

(Encyclopedia) Federal Trade Commission (FTC), independent agency of the U.S. government established in 1915 and charged with keeping American business competition free and fair. The FTC has no jurisdiction over ban...

(Encyclopedia)  CE5 Circulatory system circulatory system, group of organs that transport blood and the substances it carries to and from all parts of the body. The circulatory system can be considered as compose...

(Encyclopedia) autonomic nervous system: see nervous system. ...

(Encyclopedia) parasympathetic nervous system: see nervous system. ...

(Encyclopedia) peripheral nervous system: see nervous system. ...

(Encyclopedia) central nervous system: see nervous system. ...

(Encyclopedia) sympathetic nervous system: see nervous system. ...

(Encyclopedia) horizon coordinate system: see altazimuth coordinate system. ...