NURSING ANM AND GNM

Detailed explanation-1: -They do not possess special organelles for ingestion but obtain their nourishment simply by diffusion through general body surface. Parasitic protozoa such as Entamoeba histolytica and Balantidium coli which although feed holozoically, also absorb dissolved organic compounds through general body surface.

Detailed explanation-2: -Numerous parasites can be transmitted by food including many protozoa and helminths. In the United States, the most common foodborne parasites are protozoa such as Cryptosporidium spp., Giardia intestinalis, Cyclospora cayetanensis, and Toxoplasma gondii; roundworms such as Trichinella spp.

Detailed explanation-3: -The organisms are all heterotrophic and have specialized organelles in their cytoplasm. For example, they have two nuclei: a large macronucleus and a number of smaller micronuclei. The micronuclei carry the genetic information of the cell. The ciliate Paramecium typifies the phylum Ciliophora.