Students.fredonia.edu/cdo/c-c1
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Virus and bacteria are small and can cause problems
Thyroxine is when the main hormone is produced by the thyroid gland,acting to increase metabolic rate and so regulating growth and development.
The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach.