A high resolution view of a longitudinal section through the buccal cavity of the oral region showing portions of 3 membranelles (1, 2 and 3): each membranelle consists of 3 rows of cilia. The oral ri...

Some accessory microtubules from the proximal ends of membranelle basal bodies extend upward and curve over the left wall of the buccal cavity as can be followed in this micrograph. Some fibrous compo...

Up to three basal bodies have been seen in various stages of development near a mature basal body/cilium complex. In this micrograph 2 new basal bodies are present next to 2 cilia and 3 are forming ne...

The basal bodies in the opisthe developing oral apparatus become organized into polykinetids of the three oral membranelles (1, 2 and 3) and of the two rows of basal bodies forming the undulating memb...

11 micrographs of views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 4 food vacuoles. The helically contracted stalk is se...

Like other peritrichs the pellicle of Vorticella convallaria is sculpted into ridges and grooves that circle the cell perpendicular to the aboral/adoral axis of the cell body. Pellicular pores penetra...

V. convallaria preserved in collidine buffered fixative (not cacodylate) has a less dense cytoplasm in which oranelles are easier to recognize. The rough ER has vesiculated but this vesiculation enhan...

The contractile vacuole of V. convallaria empties into a convoluted chamber. This chamber is covered by the alveoli and plasma membrane of the pellicle and is open to the cell’s surface via the peri...

The buccal cavity opens into the developing digestive (food) vacuole at the terminal edges of the alveolar sacs that cover the buccal cavity. A plane connecting these edges would roughly describe a te...

A view of the right side of the cytopharynx showing the groove and its associated microtubules running longitudinally along the groove (for cross sections see Allen, J. Ultrastruct. Res. 63:64-78, 198...