Paramecium

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Paramecium are the most commonly observed protozoans and, depending on the species, they are from 100-350 um long. 

 They are easily maintained and cultured and Paramecium caudatum (shown at the left) are characterized by a large macronucleus and a single compact micronucleus.

The most common types used in the classroom are the Paramecium caudatum and the Paramecium multimicronucleatum (because of its size).   P. multimicronucleatum is the largest species and is slimmer and more pointed than P. caudatum.  It has one macronucleus and 3 or 4 micronuclei.

Paramecium bursaria is one of the smallest species and appears green due to the presence of its symbiotic partner, Zoochlorella.   The green algae uses the waste from the paramecium as food and in turn supplies oxygen for the paramecium to use.

The Paramecium is so well known that we have captured many images.  Click here to see them.

 
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