Embryology Flashcards
Which germ layer forms the heart?
Mesoderm
Name the 5 parts of the heart tube, from cranial to caudal end (the baby verily acquires stuff…)
Truncus arteriosus Bulbus cordis Ventricle Atrium Sinus venosus
What does the truncus arteriosus of the heart tube produce?
Aorta
Pulmonary trunk
What does the bulbus cordis of the heart tube produce?
Right ventricle
Outflow of both ventricles
What does the ventricle of the heart tube produce?
Left ventricle
What does the atrium of the heart tube produce?
Right and left atria
What does the sinus venosus of the heart tube produce?
Right atrium
Coronary sinus
Which 3 vessels enter the right + left horns of the sinus venosus?
Vitelline vein
Umbilical vein
Cardinal veins
What does the vitelline vein drain?
Yolk sac
What does the umbilical vein drain?
Placenta
What do the cardinal veins act as precursors for?
The systemic venous system
Remnants of the left horn of the sinus venosus give rise to the coronary sinus. True/False?
True
What is the function of the ductus venosus?
Directs O2-rich blood from placenta (umbilical vein) to IVC, bypassing the liver
What is the function of the foramen ovale?
Directs O2-rich blood from RA to LA so it goes to brain and not lungs
What is the function of the ductus arteriosus?
Directs deoxygenated blood from pulmonary artery to descending aorta so it goes to placenta to get O2
