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A single taste bud is composed of four different types of cells, and each taste bud has at least 30 to 80 cells.
Type I cells are thinly shaped, usually in the periphery of other cells.
They also contain high amounts of chromatin.
Type II cells have prominent nuclei and nucleoli with much less chromatin than Type I cells.
Type III cells have multiple mitochondria and large vesicles.
Type I, II, and III cells also contain synapses.
Type IV cells are normally rooted at the posterior end of the taste bud.
Every cell in the taste bud forms microvilli at the ends.

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