…a doorway, gate, or other entrance, especially a large and imposing one…
…relating to an opening in an organ through which major blood vessels pass, especially the transverse fissure of the liver…
…a vein conveying blood to the liver from the spleen, stomach, pancreas, and intestines…
…a rigid structural frame consisting essentially of two uprights connected at the top by a third member…
…the system of blood vessels consisting of the hepatic portal vein with its tributaries and branches…
…a vein conveying blood to the liver from the spleen, stomach, pancreas, and intestines…
