Abdomen

(ab-do'men.) [ Lat., from abdo, I conceal ] (Anat.) That great cavity of the body which is usually called the belly. It contains the viscera more or le immediately connected with digestion, and the kidneys which secrete the urine. By anatomists the A. is divided into three anterior regions, namely, the epigastric, or upper one: the umbilical, or middle one; and the hypogastric, or lower one. There is also a posterior region, called the regio lumbar is. [s. 2]