Undulipodia and Centrioles
Flagella and cilia have similar diameters (around 0.2 μm) and the same ultrastructure. This fact justifies the common term undulipodium for the two types of motile organelles. Their only difference is in length (cilia 5–10 μm, flagella up to or over 150 μm) and in number per cell. The flagellates carry one flagellum or two unequal flagella (Heterokontae), while the ciliates are equipped with a great number of cilia.
KeywordsBasal Body Ciliated Epithelium Condensation Form Elementary Fibril Bacterial Flagellum
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