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Embryo Test #4

what is a mesentery a double layer of peritoneum that begins as an extension of the visceral peritoneum covering an organ; connects organ to body wall and conveys vessels and nerves to it
where is the gut attached when the coelum first forms broadly attached to the dorsal body wall
what is the intraperitoneal viscera the abdominal gut tube and its derivatives suspended in what will later become the peritoneal cavity
there is nothing in the peritoneal cavity except for what? serous fluid
what does retroperitoneal mean an organ is located behind the peritoneum from a view point inside the peritoneal cavity
what are the arteries supplying the primitive gut? celiac trunk (foregut), superior mesenteric artery (midgut), inferior mesenteric artery (hindgut)
when does the primitive gut form? during the 4th week when the embryo folds and incorporates the dorsal part of the yolk sac
where is the epithelium of the cranial and caudal ends of the digestive tract derived from the ectoderm of the stomodeum and proctodeum
3 parts of the primordial gut foregut, midgut, and hindgut
derivatives of the foregut primordial pharynx and derivatives, lower respiratory system, esophagus and stomach, duodenum, liver, biliary apparatus, and pancreas
derivatives of the primordial pharynx oral cavity, pharynx, tongue, tonsils, salivary glands, and upper respiratory systems
derivatives of the biliary apparatus hepatic ducts, gallbladder, and bile duct
what does incomplete partitioning of the trachoesophageal septum result in stenoses or atresias, with or without fistulas
development of the esophagus caudal to pharynx. reaches final length by 7th week. epithelium and glands from endoderm. striated muscle (muscularis externa) of superior 1/3 from mesenchyme in caudal arches. smooth muscle in inferior splanchnic mesenchyme
development of stomach first appear as fusiform enlargement of caudal part of foregut. initally in median plane. primordium enlarges and broadens ventrodorsally. greater curvature forms dorsal and lesser curvature ventral. Rotates 90 degrees
rotation of the stomach before rotation, cranial and caudal ends are in the median plane. during, cranial regions move to the left and slightly inferiorly and caudal region moves to the right and superiorly. After, the stomach assumes its final position.
dorsal mesentery (dorsal mesogastrium) stomach is suspended from dorsal wall of abdominal cavity by a dorsal mesentery
ventral mesentery (ventral mesogastrium) attaches the stomach and duodenum to liver and the ventral abdominal wall
Created by: jacquess17