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Key points. 1  Intestinal epithelial cells (IECs) provide a physical and biochemical barrier that segregates host tissue and commensal bacteria to maintain intestinal homeostasis. 2  Secretory IECs support this function through the secretion of mucins and antimicrobial peptides.ey points. 1  Intestinal epithelial cells (IECs) provide a physical and biochemical barrier that segregates host tissue and commensal bacteria to maintain intestinal homeostasis. 2  Secretory IECs support this function through the secretion of mucins and antimicrobial peptides.
Both the gastric epithelium and intestinal epithelium are simple columnar, non-ciliated epithelial tissue. Epithelium is a type of animal tissue that lines the inner surface of several organs in the body. In fact, the word Epithelium finds its origins from the Greek words âEpiâ (that means on/onto) and âtheliâ...