Contractility of the roots of flagella and cilia.
D002923:Cilia / Q000502:physiology*; D056890:Eukaryota / Q000648:ultrastructure; D005407:Flagella / Q000502:physiology*; D008870:Microtubules / Q000502:physiology; D009068:Movement; D010786:Photoreceptor Cells / Q000502:physiology