Pseudopods are flowing projections of cytoplasm that extend and pull the amoeba forward. They are also used for surrounding and engulfing food particles. Some amoebas are parasitic. Phylum Ciliophora Ciliates are heterotrophic unicellular organisms that move via rows of cilia on the external surface of the body. There is a high level of complexity in this phylum.
Ciliates have a gullet and a contractile vacuole which is used to regulate water balance.
Another unique feature is that they contain two different types of nuclei called macronuclei and micronuclei. Vorticella is an example of a stalked ciliate. Paramecium Caudatum and Stentor are also members of the phylum Ciliaphora. It is a naked mass of protoplasm somewhat like a mass of amoebas. They superficially resemble a mushroom because they form mushroom like reproductive structures.