Multiple Choice
Which region of the stomach is located closest to the esophagus and serves as the entry point for ingested food?
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23. The Digestive System
Introduction to the Digestive System
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Which of the following structures is NOT associated with the large intestine?
A
Rectum
B
Cecum
C
Ileum
D
Ascending colon
Verified step by step guidance1
Step 1: Begin by identifying the primary structures associated with the large intestine. The large intestine includes the cecum, colon (ascending, transverse, descending, and sigmoid), rectum, and anal canal.
Step 2: Understand the function and location of the ileum. The ileum is the final portion of the small intestine and is responsible for nutrient absorption. It connects to the cecum at the ileocecal valve, marking the transition from the small intestine to the large intestine.
Step 3: Compare the listed structures (Rectum, Cecum, Ileum, Ascending colon) to the anatomy of the large intestine. The rectum, cecum, and ascending colon are all parts of the large intestine, while the ileum is part of the small intestine.
Step 4: Recognize that the ileum is NOT associated with the large intestine because it is anatomically and functionally part of the small intestine.
Step 5: Conclude that the correct answer is 'Ileum,' as it is the structure not associated with the large intestine.
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