The term "Vena Phrenica" refers to a vein that runs up both sides of the diaphragm, which is a muscular sheet separating the chest and abdominal cavities. There are a few alternative synonyms for this vein, including the Phrenic Vein and the Diaphragmatic Vein. Another related term is "Inferior Phrenic Vein," which refers specifically to the vein that drains the diaphragm. This vein connects to the liver as well as other abdominal organs. Although these terms are all used to describe a vein related to the diaphragm, they may be used in different contexts depending on the area of medicine or research.