Papilla - Definition

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Papillae are small rough forms located on the surface of the skin or various mucous membranes (soft tissue coating the interior of an organic cavity) and organs. Papillae are generally associated with nerve endings, hence their ability to relay sensory information. Those located on the tongue, called lingual papillae, are responsible for taste and the detection of acidity, bitterness, sweetness, and savory flavors. Dermal papillae on the skin surface, particularly found on the finger tips, contribute to our sense of touch and also form our finger prints. The optic papilla corresponds to the area of the retina where light rays do not reach due to the optic nerve root located there.