A threadlike projection arising from motile algal and fungal cells that has a smooth surface.
A flagellum (/fləˈdʒɛləm/ ; plural: flagella) is a lash-like appendage that protrudes from the cell body of certain prokaryotic and eukaryotic cells. The word flagellum in Latin means whip. Prokaryotic flagella run in a rotary movement, while eukaryotic flagella run in a bending movement. The prokaryotic flagella uses a rotary motor,and the eukaryotic flagella uses a complex sliding filament system. Eukaryotic flagella is ATP driven, while prokaryotes are proton driven. flagellum-a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa). eubacteria, eubacterium, true bacteria-a large group of bacteria having rigid cell walls; motile types have flagella. flagellum. n, pl-la (-lə) or-lums. 1. (Biology) biology a long whiplike outgrowth from a cell that acts as an organ of locomotion: occurs in some protozoans, gametes, spores, etc. Some flagella are not used for movement but in sensation and signal transduction by various cell types, e.g. rod photoreceptor cells of the eye, olfactory receptor neurons of the nose, kinocilium in cochlea of the ear. Word origin: Latin, diminutive of flagrum, whip. Related forms: flagellar (adjective). Supplement. In bacteria, the flagella are helical filaments made up of the protein, flagellin, and rotate like screws. In eukaryotes, such as in cells of animals, plants and protists, they are made up of microtubules surrounded by the plasma membrane and enable the cells to move in a whip-like fashion. whiplash flagellum. (acronematic flagellum) A threadlike projection arising from motile algal and fungal cells that has a smooth surface. Internally the fibrillar structure is typical of the * flagella and cilia of motile eukaryotic cells The primary role of the flagellum is locomotion but it also often has function as a sensory organelle, being sensitive to chemicals and temperatures outside the cell. Flagella are organelles defined by function rather than structure. There are large differences between different types of flagella; the prokaryotic and eukaryotic flagella differ greatly in protein composition, structure, and mechanism of propulsion. Prokaryotic flagella run in a rotary movement, while eukaryotic flagella run in a bending movement. The prokaryotic flagella uses a rotary motor,and the eukaryotic flagella uses a complex sliding filament system. Eukaryotic flagella is ATP driven, while prokaryotes are proton driven. Cilium. Definition. noun, plural: cilia. (biology). Microscopic, hair-like projection on the surfaces of some cells and of certain organisms. (botany). Any of the hair forming a fringe along the margin or edge of a plant structure, e.g. of a leaf. (anatomy). The eyelash. Supplement. flagellum-a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa). eubacteria, eubacterium, true bacteria-a large group of bacteria having rigid cell walls; motile types have flagella. Ontogenetic development of sensory structures on the antennules and ... by Henriques, Virginia Maria Cavalari; De Medeiros, Guilherme Fulgencio; New, Michael B.; Nakaghi, Laur / Journal of Shellfish Research.
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