【Abstract】 The portal venous system within liver of Neophocaena phocaenoides asiaeorientalis was observed. The portal venous system is similar to other mammals (pig, rabbit, ox, dog, goat, rhesus monkey). The R. sinister of the portal vein gives off the v.dorsalis lobi sin lat.,the v. ventralis lobi sin.lat., the v. lateralis lobi sin.med.,the v. medialis lobi sin,med.,Rr.lobi caudati and Rr.lobi quadrati; the R. dexter of portal vein gives off the v. lobi dext.med.,the v. lobi dext.lat. and the V. processus caudati. It seems that the portal venous system of aquatic mammals and terrestrial mammals show no obvious difference.更多还原