Define anterior and posterior in correlation to the body. (ANATOMY)

Anterior refers to the side of the structure facing up in the standard anatomical position while posterior refers to the bottom side. ... Dorsal and ventral are sometimes used in place of anterior and posterior, respectively. Dorsal means the back side or upper side, while ventral means the frontal or lower side.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue