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Tongue

a mobile mass of muscular tissue covered with mucous membrane and located in the oral cavity

Papillae

small rough elevations on tongue and roof of mouth; contain taste buds

Taste buds

sense receptors in the tongue that respond to sweet, salty, sour, bitter, umami, and perhaps fat

Taste pore

opening in the surface end of taste bud where cilia is extended into from receptor cells to contact tastants (substances that can be tasted)

Taste cells

the sensory receptor cells for gustation located in the taste buds

Taste hairs

tiny projections protruding from the outer ends of the taste cells extending from the taste pore. very sensitive

Basal cells

undifferentiated immature cells that undergo continuous regeneration

Supporting cells

Insulate gustatory cells from each other and surrounding epithelium

parts of tongue

Dorsum, blade & tongue tip

5 taste sensations

sweet receptors, sour receptors, salt receptors, bitter receptors, umami

Innervation of taste buds

~facial nerve (VII) - anterior 2/3's of tongue
~glossopharyngeal nerve (IX) - posterior 1/3
~vagus nerve (X) - palate, pharynx, epiglottis

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