Only the macronucleus contains nucleoli which is the site of ribosomal RNA synthesis and ribosome subunit assembly. This EM also contains the distal end of the food vacuole forming cytopharynx which c...

A nascent digestive vacuole with several acidosome-like vesicles docked at its cytosolic surface. The presence of the microtubules from the oral ribs signifies that this vacuole is still attached to t...

Tetrahymena cells that are not forming a digestive vacuole often have a tube-like extension of the cytopharyngeal membrane attached to the deep fiber that extends several microns into the cytoplasm. T...

A high resolution view near the oral apparatus of the attachment site of a microtubule filament bundle, fibrous interconnections, and a rod near a basal body that is out of the section plane in this T...

Section through the cytopharynx of Coleps showing the corrugated lips containing lamellae surrounding the atrium of the buccal cavity. Rods composed of hexagonally packed microtubules that support the...

Only the macronucleus contains nucleoli which is the site of ribosomal RNA synthesis and ribosome subunit assembly. This EM also contains the distal end of the food vacuole forming cytopharynx which c...

Food vacuoles arise from the single membrane that lines the cytopharynx. Vesicles, similar to discoidal vesicles, attach to the cytopharyngeal microtubules (lamellar clumps) that arise from the dorsal...

11 micrographs of views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 5 food vacuoles and the edges of 2 more. The connecti...

11 micrographs are views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 5 food vacuoles; 3 segments of the macronucleus; per...

A bundle of microtubules that arises from a basal body adjacent to the cytoproct comes to lie along a spent DV-IV. The assumption is that movement generated by molecular motors propels the spent vacuo...