Human digestive system the superior mesenteric artery, which supplies the regions of the digestive tract derived from the midgut, which includes the distal 2/3 of the duodenum, jejunum, ileum, cecum, appendix, ascending colon, and the proximal 2/3 of the transverse colon. The final branch which is important for the digestive system is the inferior mesenteric artery, which supplies the regions of the digestive tract derived from the hindgut, which includes the distal 1/3 of the transverse colon, descending colon, sigmoid colon, rectum, and the anus above the pectinate line. The enteric nervous system consists of some one hundred million neurons that are embedded
Further research is needed the only logical conclusion that can be drawn from a set of negative, ambiguous, incomplete or contradictory data." Academic journal editors were banning unqualified FRIN statements as early as 1990, requiring more specific information such as what "types" of research were needed, and what questions they ought to address. Researchers themselves have strongly recommended that research articles detail what research is needed. Other commentators suggest that articles would benefit by assessing the likely value of possible further research. Greenhalgh suggests that, because vague FRIN statements are an argument that "tomorrow's research investments should be pitched into precisely the same patch