taste buds

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The sensory receptors concerned with the sense of taste (see illustration). They are located in the epithelium that covers the surface of the tongue, lying in the grooves around the papillae, particularly the circumvallate papillae. Taste buds are also present in the soft palate, the epiglottis, and parts of the pharynx. When a taste cell is stimulated by the presence of a dissolved substance impulses are sent via nerve fibres to the brain. From the anterior two-thirds of the tongue impulses pass via the facial nerve. The taste buds in the posterior third of the tongue send impulses via the glossopharyngeal nerve.

Structure of a taste bud.

Subjects: Medicine and Health — Science and Mathematics.

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