Lecture 9- Fetal Circualtion Flashcards
Wall between the atria
Interatrial septum
Wall between the ventricles
Interventricular septum
valves between the atria and the ventricles
Left and right AV valves
tissue that keeps the valves of the heart from inverting
Chordae tendinae
Myocardia protrussion into the ventricles where the chordae tendinae attach
Papillary muscle
tissue connecting two walls of the right ventricle
Trabecula septomarginalis
where does contraction start in the heart
apex
do the pulmonary and aortic valves have chordae tendinae
No
What is the electrical purpose of the trabecula septomarginalis
to channel the electrical imuls to two parts of the right ventricle to give it a head start
5 fetal structures that allow it to survive in utero
Umbilical vein
Ductus vvenosus
Foramen ovale
Ductus arteriosus
Umbilical arteries
Where does the most oxygenated blood enter the fetus
Umbilical vein
How does the oxygenated blood in the umbilical vein bypass the liver
ductus venosus
What is a hole in the fetal right atrium called (not the foramen ovale)
coronary sinus
Is pressure in fetal circulation higher in the right or left atria?
Right
What takes blood out of the fetus through the umbilicus
Umbillical arteries
How long are fetal structures probe patent
2 weeks
What do the umbilical arteries become
round ligaments of the bladder
What does the umbilical vein become
round ligament of the liver
When fat surrounds the round ligament of the liver, it can be observed as the-
Falsiform ligament (not a fetal structure)
What does the ductus venosum become
ligamentum venosum
What does ductus arteriosus become
ligamentum arteriosus
