Paramecium is a eukaryotic genus commonly used as a ciliate model organism. This article will focus on details of Paramecium, diagram , classification, characteristics, size, locomotion, reproduction and more File:Paramecium diagram.svg Download Use this file Use this file Email a link Information The Diagram of Paramecium demonstrates the anatomy of this single-celled organism. Paramecium structure consists of trichocysts, contractile vacuoles, and cilia among other specialized organelles. Learn about the unicellular ciliated protozoan Paramecium, its classification, features, locomotion, nutrition and reproduction. See diagrams, examples and FAQs on Paramecium and its life cycle.