saliva


saliva
salivary /sal"euh ver'ee/, adj.
/seuh luy"veuh/, n.
a viscid, watery fluid, secreted into the mouth by the salivary glands, that functions in the tasting, chewing, and swallowing of food, moistens the mouth, and starts the digestion of starches.
[1670-80; < L saliva]

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Thick, colourless fluid constantly present in the mouth, composed of water, mucus, proteins, mineral salts, and amylase, an enzyme that breaks down starches.

One to two litres are produced daily by the salivary glands. Small amounts are continually discharged into the mouth, but the presence, smell, or even thought of food increases flow. Saliva's main function is to keep the inside of the mouth moist, making speech more fluid, dissolving food molecules for taste, and easing swallowing. It also helps control the body's water balance, since lack of it stimulates thirst when water intake has been low. Saliva reduces dental caries and infection by removing food debris, dead cells, bacteria, and white blood cells.

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      a thick, colourless, opalescent fluid that is constantly present in the mouth of humans and other vertebrates. It is composed of water, mucus, proteins, mineral salts, and amylase. As saliva circulates in the mouth cavity it picks up food debris, bacterial cells, and white blood cells. One to two litres of fluid are excreted daily into the human mouth. Three major pairs of salivary glands (q.v.) and many smaller glands scattered in the surface tissue of the cheeks, lips, tongue, and palate contribute to the total amount of saliva. Small amounts of saliva are continually being secreted into the mouth, but the presence of food, or even the mere smell or thought of it, will rapidly increase saliva flow.

      The functions of saliva are numerous. Primarily, it lubricates and moistens the inside of the mouth to help with speech and to change food into a liquid or semisolid mass that can be tasted and swallowed more easily. Saliva helps to control the body's water balance; if water is lacking, the salivary glands become dehydrated, leaving the mouth dry, which causes a sensation of thirst and stimulates the need to drink. Saliva reduces tooth decay (caries) and infection by removing food debris, dead cells, bacteria, and white blood cells. It also contains small amounts of the digestive enzyme amylase (q.v.), which chemically breaks down carbohydrates into simpler compounds.

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Universalium. 2010.

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  • salivă — SALÍVĂ s.f. Lichid apos şi puţin vâscos care se formează continuu în gură, fiind secretat de glandele salivare, care serveşte la formarea şi la înghiţirea bolului alimentar, umezeşte şi spală membrana mucoasă a gurii etc. – Din fr. salive, lat.… …   Dicționar Român

  • saliva — SALIVÁ, salivez, vb. I. intranz. A secreta, a produce (multă) salivă. – Din fr. saliver, lat. salivare. Trimis de RACAI, 07.12.2003. Sursa: DEX 98  salivá vb., ind. prez. 1 sg. salivéz, 3 …   Dicționar Român

  • saliva — saliva, gastar saliva (en balde) expr. hablar inútilmente, en vano. ❙ «No merece la pena gastar saliva con los que no saben y presumen...» Juan Madrid, Un beso de amigo. ❙ «No quiero gastar saliva en balde...» Fernando G. Tola, Cómo hacer… …   Diccionario del Argot "El Sohez"

  • Saliva — Sa*li va, n. [L.; cf. Gr. ?.] (Physiol.) The secretion from the salivary glands. [1913 Webster] Note: In man the saliva is a more or less turbid and slighty viscid fluid, generally of an alkaline reaction, and is secreted by the parotid,… …   The Collaborative International Dictionary of English

  • saliva — f. gastrol. Líquido claro y relativamente fluido constituido básicamente por agua, lisozima, albúmina, leucocitos, tialina, amilasa, etc. Es secretada por las glándulas salivares de la boca: parótida, submaxilar y sublingual. Sus principales… …   Diccionario médico

  • saliva — sustantivo femenino 1. Líquido acuoso y alcalino segregado por las glándulas salivales de la boca, que reblandece los alimentos y los prepara para su digestión. Frases y locuciones 1. gastar saliva Uso/registro: coloquial. Hablar inútilmente (una …   Diccionario Salamanca de la Lengua Española

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  • saliva — (Del lat. salīva). f. Líquido de reacción alcalina, algo viscoso, segregado por glándulas cuyos conductos excretores se abren en la cavidad bucal de muchos animales, y que sirve para reblandecer los alimentos, facilitar su deglución e iniciar la… …   Diccionario de la lengua española

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  • saliva — s.f. [lat. salīva ]. (fisiol.) [liquido incolore secreto da ghiandole annesse al cavo orale che favorisce la masticazione, la deglutizione, la fonazione e la lubrificazione dell esofago] ▶◀ ‖ Ⓖ bava, Ⓖ schiuma (alla bocca) …   Enciclopedia Italiana


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