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Intestinal Epithelium

Meaning

The Intestinal Epithelium is the single, crucial layer of specialized cells that lines the inner surface of the gastrointestinal tract, from the small intestine through the colon. This layer performs the dual, critical functions of selectively absorbing digested nutrients and water while simultaneously acting as a robust physical and immunological barrier against luminal pathogens, toxins, and undigested food particles. Its integrity is paramount for gut health and systemic hormonal and immune balance.