the paramecium caudatum

abstract animal background biology caudatum cell cilia ciliate ciliophora color cutout cytoplasm drawing educational element flat graphic illustration infusoria infusorian infusorium isolated laboratory medical medicine micro microbiology microorganism microscope nature nobody nucleus object oligohymenophorea one organism paramecium peniculida picture protist protozoa single structure unicellular vacuole vacuoles vector watercolor white