Answer :
a) If the salivary ducts are closed, no saliva will be secreted in the mouth.
b) This may lead to the food mass still being hard and difficult to swallow, as well as lacking moisture. Passing such food mass down the food pipe might cause injury and lesions on the walls.
c) Saliva also contains salivary amylase which is an enzyme that breaks down large starch molecules present in the food into smaller sugar molecules and is the first step in the digestion of food.
d) Due to accumulation of saliva in the glands, they might swell up due to inflammation and cause pain.
e) Hence, closed salivary ducts can cause obstruction in the digestion process as well as cause harm to the organs involved.
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