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Drawing by Alfred Kahl "Slipper animalcule", illustrated by Louis Joblot, 1718. Paramecium caudatum is 170–330 micrometres long (usually 200–300 micrometres). [6] The cell body is spindle-shaped, rounded at the front, tapering at the posterior to a blunt point. Early microscopists likened its shape to that of a slipper, and commonly ...
Added a label for the buccal overture, a structure frequently mislabeled as the cytostome on diagrams of Paramecium. For an accurate representation of these structures, see: Ralph Wichterman, The Biology of Paramecium, 2nd Edition, 1986 (fig. 1.3A, on... 19:47, 5 June 2017: 1,142 × 1,007 (149 KB) Deuterostome: Lengthened buccal cavity, for ...
The question of whether Paramecium exhibit learning has been the object of a great deal of experimentation, yielding equivocal results. However, a study published in 2006 seems to show that Paramecium caudatum may be trained, through the application of a 6.5 volt electric current, to discriminate between brightness levels. [29]
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Paramecium are adaptive to many environments due to the diastole and systole movements of the contractile vacuole, which either let in or expel water from the cytoplasm depending on the environment. The micronucleus and macronucleus together contain all of the genetic information for the organism.
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