Examlex
Define the following terms
-internal validity
Pylorus
The portion of the stomach that connects to the duodenum; it regulates the passage of partially digested food into the small intestine.
Ileum
The final and longest segment of the small intestine, where significant nutrient absorption and reabsorption of bile salts occur.
Duodenum
The first section of the small intestine immediately beyond the stomach, responsible for the initial phase of digestion.
Central Vein
Terminal branches of the hepatic veins that lie centrally in the hepatic lobules and receive blood from the liver sinusoids.