Embryology - Digestive System Flashcards
Which part of the primitive gut stays connected to the yolk sac? By what?
Midgut by the vitelline duct/ yolk stalk
Which two part can the foregut be divided into?
The pharyngeal gut (oropharyngeal memrbane to the respiration year diverticulum) and rest of foregut (until liver bud)
From where to where does the midgut extend?
From the liver but to 2/3 of the transverse colon
From where to where does the hindgut extend?
From the left third of the transverse colon to the cloacal membrane
What does endoderm give rise to in the digestive tract?
Epithelial lining and specific cells (parenchyma of glands, hepatocytes, endo- and exocrine cells)
What are mesenteries?
Mesenteries are double layers of peritoneum that enclose an organ and connect it to the body wall
What does the dorsal mesogastrium form?
Greater omentum/ dorsal mesogastrium, dorsal mesoduodenum, dorsal mesocolon, mesentery proper of the jejenum and ileum.
What does the ventral mesogastrium form?
Lesser omentum and falciform ligament (and peritoneal covering of the liver)
Which septum divides the respiratory diverticulum into a respiratory primordium and the esophagus?
Tracheoesophageal septum
How does the stomach rotate?
It rotates 90 degrees around a longitudinal axis, causing its left side to face anteriorly, and its right side to face posteriorly
Why is the left vagus innervating the anterior wall of the stomach, and the right vagus innervating the posterior side?
Because the stomach rotates 90 degrees
Why is the greater and lesser curvature created?
Because the posterior wall of the stomach grows faster than the anterior.
Where does the spleen primordium first appear?
In dorsal mesogastrium
By which ligament is the spleen connected to the stomach?
Gastrolienal ligament
By which ligament is the spleen attached to the kidney?
Lienorenal ligament
