The midgut is the portion of the embryo from which most of the intestines are derived. After it bends around the superior mesenteric artery, it is called the "midgut loop". Embryos (and one tadpole) of the wrinkled frog (Rana rugosa). ... The intestine is the portion of the alimentary canal extending from the stomach to the anus and, in humans and other mammals, consists of two segments, the small intestine and the large intestine. ... The superior mesenteric artery arises from the anterior surface of the aorta, just inferior to the origin of the celiac trunk, and supplies the intestine from the duodenum and pancreas to the left colic flexure. ...
Malrotation of the midgut during development can lead to volvulus. A volvulus is a loop of bowel that has twisted on itself, possibly resulting in loss of blood flow to part or all of the intestines (strangulation). ...
The foregut is the anterior part of the alimentary canal, from the mouth to the intestine, or to the entrance of the bile duct. ... Hindgut is the posterior (caudal) part of the alimentary canal. ...
The midgut is derived from the anterior and posterior midgut primordia during the process of gastrulation [Images].
The anterior midgut is formed from the anterior midgut primordium; the posterior midgut is derived from the posterior midgut primordium, and the midgut proper is derived from endodermal cells that migrate from both anterior and posterior primordia.
These midgut expression profiles were compared to those reported for salivary glands at and after 10 hr APF, when a prepupal pulse of ecdysone triggers apoptosis in that tissue; almost the entire genetic cascade was found to be similarly activated in salivary glands and midgut albeit at two distinct periods of development.
Six midgut clones were closely related (96% sequence similarity) to Turicibacter sanguinis, a recently described strictly anaerobic gram-positive bacterium isolated from a blood sample of a human with acute appendicitis (4).
Since the corresponding 95% confidence intervals were 57 and 186 for the midgut community and 72 and 214 for the hindgut community, species richness in the hindgut is not significantly higher than that in the midgut (26).
The dramatic changes in the physicochemical conditions between the midgut and hindgut of scarabaeid beetle larvae (35) are in good agreement with the major differences in the bacterial community structure: the relative dominance of 16S rRNA genes of Actinobacteria in the midgut and of members of the CFB phylum in the hindgut.
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