primary cilia are everywhere, microtubule-based organelle that plays a diverse role in sensory transduction in many eukaryotic cells. They interrogate the cellular environment through chemosensing, osmosensing, and mechanosensing using receptors and ion channels in the membrane of the cilia. Little is known about the mechanical properties and structural cilia and how these properties contribute to the perception of the cilia. We probed the mechanical response of the primary cilia of kidney epithelial Human Clia Kits cells [Madin-Darby canine kidney-II (MDCK-II)], which feel the flow of fluid in the kidney tubules. We found that, in the manipulation of the optical trap, cilia Deflect by bending along their length and revolve around the effective hinge is located below the basal body. calculated bending stiffness showed weak coupling doublet microtubules. primary cilia of MDCK cell deficiency interdoublet dynein motors. However, we found that organelles displays ...