The precise demarcation amongst the upper and reduce tracts could be the suspensory muscle on the duodenum. This differentiates the embryonic borders between the foregut and midgut, and is likewise the division usually used by clinicians to explain gastrointestinal bleeding as currently being of possibly "upper" or "lower" origin. Structural https://origemlab.com.br/teste-de-perfil-intestinal-completo/