Within the phylum Protozoo, there are five classes which contain organisms
parasitic to man. The classes are: Rhizopoda, Zoomastigophorai Ciliata,
Piroplasmasida, and Sporozoa. The identification forms and life cycles of Rhizopoda
and Zoomastigophora will be described in this lesson. Ciliata, Piroplasmasida, and
Sporozoa will be described in Lesson 2.
Figure 1-1. Vesicular nucleus.