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Basal bodies are supported by three fiber systems, a striated
kinetodesmal fiber (kd) that arises from the proximal end of
the basal body and curves upward and anteriorly within the
longitudinal ridge to the cell’s right side of a row of basal bodies
(kinety). Extending posteriorly and also curving up into the
longitudinal ridge is a ribbon of postciliary microtubules (pc
mt). The kd may extend past several more anterior basal bodies but
the postciliary ribbon does not extend beyond the next posterior basal
body or pair of basal bodies in the kinety. Only the more posterior of
the two basal bodies within a single depression is associated with the
ends of these two accessory structures. An indentation of the plasma
membrane, the parasomal sac (ps), lies to the cell's right of
each basal body or pair of basal bodies. EM taken on 1/5/73 by R.
Allen with Hitachi HU11A TEM. Neg. 19,500X. Bar = 0.2µm.
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