portalvaten
Portalvaten refers to a specialized circulatory system found in vertebrates where blood vessels connect two capillary beds. The most well-known example is the hepatic portal system, which transports blood from the digestive organs (stomach, intestines, spleen, and pancreas) directly to the liver. This arrangement allows the liver to process nutrients absorbed from the digestive tract before they enter the general circulation.
In the hepatic portal system, capillaries in the digestive organs collect absorbed substances. These capillaries then
Another example of a portal system is the hypophyseal portal system, which connects the hypothalamus to the