Histochemical and histoenzymatic observations on the intestinal epithelium of Haemonchus contortus (Nematoda)
Keywords:
Intestinal epithelium, microvilli, histochemistry, nematoda, Haemonchus contortusAbstract
Histochemically, an intense concentration of glycogen, general proteins, lipids, nucleic acids and acid and alkaline phosphatases is seen in the intestinal epithelium of Haemonchus contortus. A well developed microvillar border positive for general carbohydrates, - NH2 bound proteins, lipids, acid phosphatases is present. The microvillar border is totally free from glycogen indicating that the microvilli help in the absorption of simple carbohydrates, which in turn are converted to and stored in the form of glycogen in the intestinal epithelium. The intestine of H. contortus does not only act as a place for the transport of absorbed materials but also a tissue of considerable synthetic activity. The presence of proteins and RNA activity indicates that the intestinal protein synthesis pool also distributes a large quantity of protein to the other body organs. A close approximation of intestine with the reproductive organs indicates the trans-membrane flow of nutrients from the former to the later.
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