(1) The epithelium cells of digestive tube with or without the striated border can be used as one of important standard for distinguishing the midgut from foregut and hindgut.

(2) Water can directly flow through the digestive tube and absorbed by the body.

(3) The digestive ability is adapt to feeding and construction of digestive tube.

(4) The imagination of descent confirms the Freudian intuition that the digestive tube is the descending axis of the libido before its sexual fixation.

(5) Objective: To explore the configuration and distribution of the digestive tube argentaffine cell of Bufo bufo Gargarizans.