244 Review Sheet 18 Hepatic Portal Circulation 15 What is the source of blood in the hepatic portal system lood drained Viscera from 16 Why is this blood carried to the liver before it enters the systemic circulation Because the blood from these Omgans is rich in nutrient alcohol protentially toxic substances that the liver needs to metabolize neutralise and detoxify 17 The hepatic portal vein is formed by the union of a which drains the and b Pal drains the Structure and curvature of the stomach empties directly into the hepatic portal vein 18 Trace the flow of a drop of blood from the small intestine to the right atrium of the heart noting all structures encountered or passed through on the way Umbilical artery Umbilical vein Fetal Circulation 19 For each of the following structures first indicate its function in the fetus and then note its fate what happens to it or what it is converted to after birth Circle the blood vessel that carries the most oxygen rich blood Ductus venosus The Ductus arteriosus Foramen ovale the digestive Function in fetus Carry cleoxygenated blood from fetal circulation to Placental 20 What organ serves as a respiratory digestive excretory organ for the fetus which vein which drains the lesser Fate Placenta