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midgut medical definition
noun
- The middle section of the digestive tract in a vertebrate embryo from which the ileum, jejunum, and portions of the duodenum and colon develop. Also called mesenteron.
- The middle portion of the digestive tract of certain invertebrates, such as arthropods, that is lined with an enzyme-secreting tissue and that serves as the main site of digestion and absorption.
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