Editing Cilium (section)

====Modified motile cilia====
Motile cilia without the central pair of singlets (9+0) are found in early embryonic development. They are present as nodal cilia on the nodal cells of the [[primitive node]]. Nodal cells are responsible for the [[left-right asymmetry]] in [[bilaterians|bilateral animals]].<ref name="Desgrange"/> While lacking the central apparatus there are [[dynein arm]]s present that allow the nodal cilia to move in a spinning  fashion. The movement creates a current flow of the extraembryonic fluid across the [[primitive node|nodal surface]] in a leftward direction that initiates the left-right asymmetry in the developing embryo.
<ref name="Horani"/><ref name="Larsen"/>

Motile, multiple, 9+0 cilia are found on the epithelial cells of the [[choroid plexus]]. Cilia also can change structure when introduced to hot temperatures and become sharp. They are present in large numbers on each cell and move relatively slowly, making them intermediate between motile and primary cilia. In addition to 9+0 cilia that are mobile, there are also solitary 9+2 cilia that stay immobile found in hair cells.<ref name=Takeda/>