luni, 30 ianuarie 2012

Why Spit is Important

Why Spit is Important
The mouth or the oral cavity is the first stop in the human gastrointestinal tract. It is the area that receives the food. Inside the mouth are the salivary glands, which is an important fluid that aids in the process of digestion. 98% of human saliva is composed of water, while the remaining amount is made up of other compounds.
In the initial stage of digestion, saliva is produced to break down some of the fat and starch in the food. Saliva contains some enzymes that

Starting Baby on Solids

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