High resolution micrograph of the cortex of Tetrahymena. One parasomal sac lies anterior to each basal body of the somatic ciliature. A parasomal sac is an indentation of the plasma membrane that pene...

A high resolution image of the pellicle of Opercularia coarctata. Indentations of the plasma membrane penetrate the alveolar membranes end as coated pits. These pits are also known as pellicular pores...

A high resolution image of the cortex of Paramecium consists of a plasma membrane and alveolar sacs, with their inner and outer alveolar membranes that limit the area in which endocytosis can easily o...

A high resolution image of a cell actively undergoing endocytosis that develops an extensive layer of vesicles and cisternae composed for the most part of smooth undecorated membrane. The uncoated cis...

A glancing view of the thigmotactic ciliature of Conchophthirus reveals details of cortical structure. CIL:39230 is a near serial section. Both exhibit the characteristic zig-zag kinetal arrangement o...

A glancing view of the cortex of Conchophthirus reveals details of cortical structure. This includes the nature of the cell membrane and the alveolar membranes that reside immediately below the surfac...

A glancing view of the cortex of Conchophthirus reveals details of cortical structure. A near serial section with CIL:39232. This includes the nature of the cell membrane and the alveolar membranes th...

This EM features the striated bands that link the membranes under the surface depressions of the cortex. The bands insert into the epiplasm, and in this case, they separate to pass around the parasoma...

A high resolution of a quick-freeze deep-etch rotary shadowed replica of a parasomal sac from which a clathrin-coated preendosomal vesicle has pinched off. The typical clathrin cage structure is prese...

Cell sectioned perpendicular to the surface. The parasomal sac ends internally as a coated pit, coated with clathrin. Where the coated pit has pinched off a clathrin-coated vesicle is formed. When the...