The peristome is covered on one side by the oral cilia and on the opposite by the ribbed wall. Lamellae from the ribbed wall extend into the nascent food vacuole forming region, the cytopharynx. This ...

The accessory microtubules at the proximal ends of the polykinetids, both in cross section and tangential section, are highlighted at higher magnification. This section shows one parasomal sac as well...

The accessory microtubules at the proximal ends of the polykinetids, both in cross section and tangential section, are highlighted at higher magnification. This section shows one parasomal sac as well...

This group represents a serial series of sections. At the level of this section, a little deeper in the cell the spongiome of the CV is more pronounced. Oral membranelles in the buccal cavity are indi...

This group represents a serial series of sections. At the level of this section, the macronucleus and micronucleus are present. The buccal cavity with cilia and the spongiome of CV, membranelles of pe...

This group represents a serial series of sections. At the level of this section the funnel shaped oral region is now reduced to a narrow cytopharyngeal tube extending toward the aboral region of the c...

This group represents a serial series of sections. At the level of this section, the macronucleus and micronucleus are present. In the buccal cavity a row of paroral cilia is seen to separate the bucc...

A high resolution image of the oral ribs with their microtubular ribbons and alveolar tubes pass through the cytostome to the cytopharynx and nascent vacuole region. In this view the left wall of the ...

At the posterior end of the buccal cavity the right side of the cytopharynx can be seen where it meets the left side. The right side has a groove in which microtubules lie parallel to the long axis of...

Quick-freeze deep-etch rotary-shadowed replica of a portion of the chemically-unfixed cytopharynx. The cytopharynx is continuous with the plasma membrane and is covered by only one membrane which is p...