Multiple Choice
Most saliva is produced during which of the following times in relation to meals?
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23. The Digestive System
Introduction to the Digestive System
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The alimentary canal extends, in its entirety, from which structure to which structure?
A
the esophagus to the large intestine
B
the pharynx to the rectum
C
the stomach to the anus
D
the mouth to the anus
Verified step by step guidance1
Step 1: Begin by understanding the term 'alimentary canal,' which refers to the continuous muscular tube that runs through the body, responsible for digesting food and absorbing nutrients.
Step 2: Recall the anatomical structures involved in the digestive system. The alimentary canal starts at the mouth, where food enters, and ends at the anus, where waste is expelled.
Step 3: Compare the options provided in the question. Evaluate each pair of structures to determine if they represent the full extent of the alimentary canal.
Step 4: Eliminate incorrect options based on anatomical knowledge. For example, the esophagus to the large intestine excludes the mouth and anus, and the stomach to the anus excludes the esophagus and pharynx.
Step 5: Confirm that the correct answer is 'the mouth to the anus,' as this pair accurately represents the entire length of the alimentary canal.
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