Top left: Helical tendril of a climber plant
Top middle: Penetration of the oocyte membrane in an ICSI procudure
Top middle: Arterial tissue (see also Holzapfel, Gasser & Ogden)
Bottom left: Pseudomonas bacteria with polar flagella
Bottom middle: Flow field around a swimming Volvox carteri
Bottom right: SEM of rabbit tracheal airway cilia