Presented by Gary and Brandon Flagellum/Cilium Presented by Gary and Brandon

A flagellum is a tail-like structure that projects from the cell body of certain prokaryotic and eukaryotic cells which functions in locomotion. Sperm cell Helicobacter Pylori

Prokaryotic flagella are protein fibers that extend out from the cell Prokaryotic flagella are protein fibers that extend out from the cell. These flagella allow bacteria to swim at a rather high rate of speed by rotating their flagella like screws.

Eukaryotic flagellum/cilium consists of a circle of 9 microtubule pairs surrounding two central microtubules; this arrangement is referred to as the 9+2 structure.

Flagellum moves in a propeller like motion, while Cilia beats back and forth to move mucus, etc. in one direction, ex: cilia lining trachea move dirt and mucus away from lungs.

References: 1;Wikipedia. 2;raven biology text book. 3;various other sources.