Your upper digestive tract and your esophagus also contain smaller clusters of salivary glands. Saliva contains special enzymes that help digest the starches in your food. An enzyme called amylase breaks down starches (complex carbohydrates) into sugars, which your body can more easily absorb.
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After waves break on shore, the water runs down the beach back into the ocean. Waves transport energy, not water. As a wave crest passes, the water particles move in circular paths. The movement of the floating inner tube is similar to the movement of the water particles.
all of them because they have to work together in order to do its job