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Image #   250929-24
Name:   Paramecium multimicronucleatum - ciliated protozoan
Copyright:   Copyright 2006 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Light micrograph of Paramecium (Paramecium multimicronuleatum), a ciliate protozoan, undergoing fission (cell division / mitosis). First the micronuclei divide and redistribute throughout the cytoplasm and then the macronucleus forms two distinct halves. Paramecium are found mainly in stagnant ponds, feeding on bacteria and plant particles. They have a permanent mouth called an oral grove. Food taken in through the oral groove is digested within temporary digestive vacuoles in the cell cytoplasm. The two contractile vacuoles act as osmotic regulators, controlling the flow of water across the ciliate's membrane. The contractile vacuoles are surrounded by a halo of radiating channels. Excess water collects in the channels, drains into the vacuole and is then discharged through a pore at the surface.
Magnification*: x112
Type: LM Brightfield
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   02.01.06 250929-24 cell division cell fission cell membrane cilia ciliatd protozoan ciliate cilium contractile vacuole digestive vacuole eukaryote food groove food vacuole fresh water fresh water organism freshwater freshwater organism LM macronucleus micronucleus mitosis nucleus oral groove Paramecium multimicronucleatum protist protista protists proton pump protozoa protozoan single cell unicellular

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