ANAT20006 Lecture Notes - Lecture 8: Pronephros, Ductus Venosus, Mesonephric Duct

• School: University of Melbourne
• Department: Anatomy and Neuroscience
• Course: ANAT20006
• Professor: Junhua Xiao

Document Summary

* cardinal systemic circulation one that we currently have circulation that goes out of the heart into the tissues of the body via arties and returns via veins. * yolk sac has no yolk so vitelline circulation not directly nutritive but has other functions. The vitelline circulation carries blood into the yolk sac and back and brings nutrients from the yolk so the embryo could grow. * umbilical circulation is nutritive circulation that leaves the embryo and goes into the wall of the uterus where nutrients and gases are exchanged with the maternal circulation and this material is brought back into the embryo. Circulation in the fetus umbilical and systemic circulation: * this is the circulation up until birth. * oxygenated blood (formed in placenta) via the umbilical vein (half into liver, half into inferior vena cava) * sphincter (functional not anatomical) on ductus venous regulate flow the blood joins the systemic circulation through around the liver.