"stax.org/ details/books/microbiology . Right: Modification of work by (c) Ute Frevert. CC BY 42.5 Generic. https://commons.wikimedia.org/ wiki/File:Malaria.jpg Figure 2.51: This specimen of the ciliate Balantidium coli is a trophozoite form isolated from the gut of a primate. modification of Figure 2g in Kouassi RY, McGraw SW, Yao PK, Abou-Bacar A, Brunet J, Pesson B, Bonfoh B, N’goran EK, Candolfi E. Diversity and prevalence of gastrointestinal parasites in seven non-human pri - mates of the Taï National Park, Côte d’Ivoire. Parasite. 2015;22:1. doi: 10.1051/parasite/2015001. CC BY 4.0. https://commons.wiki - media.org/wiki/File:Balantidium_coli_trophozoite.jpg Figure 2.52: Paramecium has a primitive mouth (called an oral groove) to ingest food, and an anal pore to excrete it. Left: (c) Rice University. OpenStax Microbiology. CC BY 4.0. https://open - stax.org/details/books/microbiology . Right: Luis Fernández García. CC BY SA 3.0 Unported. https://commons.wikimedia.org/wiki/ File:Paramecium.jpg BASIC MICROBIOLOGY 203\n\nFigure 2.53: This differential interference contrast micrograph (magnification: ×65) of Stentor roeselie shows cilia present on the margins of the structure surrounding the cytostome; the cilia move food particles. Modification of work (c) picturepest. https://flic.kr/ p/oRgy8Q . CC BY"