the flagellum is located in the nucleus of a cell.
the flagellum is located in the nucleus of a cell.
where is the flagellum located in a cell?
nucleus
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a flagellum (; plural: flagella) is a lash-like appendage that protrudes from the cell body of certain bacteria and eukaryotic cells termed as flagellates. a flagellate can have one or several flagella. the primary function of a flagellum is that of locomotion, but it also often functions as a sensory organelle, being sensitive to chemicals and temperatures outside the cell. the similar structure in the archaea functions in the same way but is structurally different and has been termed the archaellum.
flagellum
the trophozoite shape varies among "retortamonas" species. pyriform, fusiform, and rounded structures have all been found. many are described to have a blunt anterior region and a pointed posterior, ending in a needle-like tail. a notable difference in cell length among species has also been recognized. all species have an enlarged feeding groove acting as the mouth of the organism and a small nucleus located in the anterior region of the cell body. the feeding groove, located near the nucleus, is divided into two sections; an anterior and a posterior pocket positioned in the upper region and deeper within the cell respectively. "retortmonas" species lack of an axostyle, kinetoplast, and parabasal body. in addition, species of this genus also lack mitochondria, golgi apparatus, and an undulating membrane, a shared characteristic with the other genus of the family retortamonadidae. all species of "retortamonas" possess two flagella; one free, anteriorly-directed flagellum, and one posteriorly-directed, vaned, trailing flagellum located in the feeding groove. while in some species the posterior flagellum is confined within the feeding groove, in others it extends far out beyond this oral pouch. the functionality of both the anterior and posterior flagella is consistent across all "retortamonas" species. the anterior flagellum aids in locomotion by moving in a whip-like motion, allowing the cell body to propel forward. the trailing, recurrent flagellum extends out from the feeding groove and is most likely involved only in feeding mechanisms such as ingestion. a single, spherical nucleus is present in the anterior region of the cell body.
retortamonas