DESCRIPCIÓN HISTOLOGICA DEL SISTEMA DIGESTIVO DE Didelphis marsupialis (Linnaeus, 1758)
GUTIERREZ RICO, JOSÉ DAVID | 2017-09
The majority of the marsupials widely distributed in South America are represented by the Didelphidae family. Given the different environmental conditions of this continent in relation to the Australian, there are several adaptations that originate an American and an Australian line. For various reasons the Australian species have been more studied and known that American, making certain concepts about the group is widespread. This species is widely distributed throughout the national territory, thanks to the ability to adapt to different areas and variety climates, where the growth of urban or suburban areas into wildlife areas, generates these are considered a pest by affecting the livelihoods of humans. The International Union for Conservation of Nature defines the conservation status for D. marsupialis as LR / lc, which is interpreted as a species in lower risk and less concern. For this work, fixed tissues were used in 10% buffered formalin of two specimens of the species D. Marsupialis, which were subsequently processed by routine methods for staining hematoxylin and eosin. The digestive tract of D. marsupialis presented the four tunics reported for other mammals, mucosa, submucosa, muscular and serous; in the small intestine villi they were characterized by long and slender in all segments, with presence of mainly absorbing surface cells and goblet cells.