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Circumvallate papillae: isolated taste bud, supporting or protecting cell, and taste cell

Legend: (A) isolated taste bud, from whose upper free end project the ends of the taste cells; (B) supporting or protecting cell; (C) taste cell. (Source: Hollis EW. A Text-Book in General Physiology and Anatomy. New York, Cincinnati [etc.]: American Book Co., 1877.)

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