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Fig. 27: Oral region - left side of buccal cavity

The left side of the buccal cavity is covered by the plasma membrane (pm), alveoli (al) and a single partial layer of microtubules (mt). Specialized cytoplasm (sc) lines the posterior end of this border. Oral ribs contain microtubular ribbons and interdigitate with alveolar tubes. dic, dictyosome; m, mitochondrion; lip, lipid droplet. EM taken on 8/21/67 by R. Allen with Philips 200 TEM. Neg. 12,400X. Bar = 0.5µm.
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