The precise demarcation concerning the upper and lessen tracts is the suspensory muscle mass on the duodenum. This differentiates the embryonic borders amongst the foregut and midgut, and is likewise the division typically used by clinicians to describe gastrointestinal bleeding as becoming of either "higher" or "lower" origin. Inflammatory conditions. https://origemlab.com.br/teste-de-perfil-intestinal-completo/