Final answer:
The small intestine (duodenum, jejunum, ileum, ileocecal valve) and the large intestine (ascending colon, transverse colon, descending colon, sigmoid colon, cecum, appendix) are key structures related to small and large intestines.
Explanation:
The small intestine includes the duodenum, jejunum, ileum, and the ileocecal valve. On the other hand, the large intestine consists of the ascending colon, transverse colon, descending colon, sigmoid colon, cecum, and the appendix.
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