In this article we will discuss about the life history of Entamoeba histolytica (explained with diagram). Amoebiasis or more correctly it should be called as amoebic dysentery is caused by a protozoan parasite known as Entamoeba histolytica. This kind of protozoan parasite resides in the mucous and sub-mucous layer of the large intestine specially at the iliocaecal junction and cause [...]
Sporocyst Larva: It looks like an elongated sac, about 0.7 mm long. Its body-wall retains all the layers of body wall of Miracidium except the ciliated ectoderm. During metamorphosis into Sporocyst, the outer coat of ciliated cells is thrown off, the pigment cells of the eye-spot separate from one another and loose their crescentic form and the organism becomes a [...]
In this article we will discuss about the external morphology of roundworm or Ascaris. Ascaris resembles an ordinary earthworm and is the largest intestinal nematode parasitising man. It is milk-white in colour but presents a reddish-yellow shade. Body is elongated, cylindrical, and gradually tapering at both ends. The females are usually 20-25 cm in length and 5 mm in diameter [...]