Problemquestion 1 from the lumen to the external surface, Ask an Expert

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Problem:

Question 1: From the lumen to the external surface what are the tissues that form the digestive tube wall?

Question 2: What is the location of the salivary glands in humans? What is the approximate pH of the salivary secretion? Is it an acid or basic fluid? What are the main functions of saliva?

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Category:- Biology
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