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Sections through the CV in diastole (filling phase) show a level
where some of the radial arms are connected to the CV and where some
ribbons of microtubules are leaving the CV to form the framework for
the radial arms. The radial arms consist of the ribbon to which is
attached a collecting canal and a meshwork of “smooth” tubules.
Farther from the CV, decorated tubules will surround and empty into
the smooth tubules. Inward from the level of the juncture with the
radial arms the CV membrane can be seen to expand out from the tubular
remnants of the collapsed CV (arrowheads). At least 11 ribbons
of microtubules can be seen around the surface of this CV. EM taken on
4/5/80 by R. Allen with Hitachi HU11A TEM. Neg. 7,000X. Bar = 1µm.
Part published in J. Protozool. 35:63-71, 1988.
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