Adolfo Sánchez-Blanco, PhD🇪🇸🇺🇸 on Instagram: "The small intestine plays a critical role in digestion and nutrient absorption. It is composed of three distinct regions: the duodenum, jejunum, and ileum. Each part has a unique structure and function, working together to efficiently process food as it moves through the digestive tract. . The jejunum is the middle portion of the small intestine (between the duodenum and the ileum). By the time chyme reaches the jejunum, most of the chemical dige