"ENVO"^^ . "saliva"^^ . . . "Saliva is a slightly alkaline secretion of water, mucin, protein, salts, and often a starch-splitting enzyme (as ptyalin) that is secreted into the mouth by salivary glands, lubricates ingested food, and often begins the breakdown of starches."^^ . "ENVO:02000036"^^ . "Wikipedia:Saliva"^^ .