Linked from
The 34 pages that link to Flagellum, each with the reason it gives.
TubulinBroader topic: Tubulin supplies the microtubule framework for eukaryotic flagella.
SpermatozoonBroader topic: The sperm tail is a specialized flagellum that drives forward motion.
ZoosporeBroader topic: Zoospores swim by beating one or more flagella.
ProtozoaBroader topic: Flagellates use one or more flagella for locomotion and, sometimes, feeding.