In addition to the diaphragm, the septum transversum contributes to the formation of which organ?

In addition to the diaphragm, the septum transversum contributes to the formation of which organ?

• A. Heart
• B. Pancreas
• C. Liver
• D. Gallbladder

Answer: (C)

The important idea here is that the septum transversum serves as the tissue backbone for the liver as the foregut hepatic diverticulum grows into it, forming the liver primordium while also becoming part of the diaphragm. As the hepatic diverticulum from the foregut pushes into the septum transversum, liver tissue develops within this mesenchymal mass, giving rise to the liver parenchyma. The heart comes from cardiogenic mesoderm, and the pancreas and gallbladder originate from foregut endoderm and the biliary duct system, not from the septum transversum. So, the organ formed with the diaphragm and supplied by the septum transversum is the liver.

The important idea here is that the septum transversum serves as the tissue backbone for the liver as the foregut hepatic diverticulum grows into it, forming the liver primordium while also becoming part of the diaphragm. As the hepatic diverticulum from the foregut pushes into the septum transversum, liver tissue develops within this mesenchymal mass, giving rise to the liver parenchyma. The heart comes from cardiogenic mesoderm, and the pancreas and gallbladder originate from foregut endoderm and the biliary duct system, not from the septum transversum. So, the organ formed with the diaphragm and supplied by the septum transversum is the liver.