Fetal circulation - Lab Quiz 3

ductus arteriosus

- open in fetus but shortly after birth this blood vessel is sealed off (closed) - is now called the ligamentum arteriosum - arterial vessel that connects pulmonary trunk with the aorta

placenta

A mass of tissue that is attached to the wall f the uterus and connected to the developing fetus by the umbilical cord; it supplies nutrients and eliminates waste products

Umbilical vein

high oxygen levels in umbilical vein which circulates from the placenta and merges with the inferior vena cava towards the fetal heart

umbilical arteries

low oxygen levels in umbilical arteries which circulates away from the fetal heart back to the placenta

foramen ovale

open in fetus but at birth it closes and is now called the fossa ovalis; - openining in atrial septum for blood to go from R atrium to L A