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== Basic Anatomy and Physiology ==
== Basic Anatomy and Physiology ==
The intestines are a portion of the alimentary tract extending from the pylorus to the anus. In mammals, the intestines are divided into two main segments: the small intestine and the large intestine. Each is further subdivided anatomically, the small intestine into the duodenum, jejunum, and ileum and the large intestine into the caecum and colon.
=== Cell types ===
=== Cell types ===
=== Defense Mechanisms ===
=== Defense Mechanisms ===