As nouns the difference between saliva and ptyalin

is that saliva is a clear, slightly alkaline liquid secreted into the mouth by the salivary glands and mucous glands, consisting of water, mucin, protein, and enzymes. It moistens the mouth, lubricates ingested food, and begins the breakdown of starches while ptyalin is a form of amylase found in saliva that breaks down starch into maltose and dextrin.