2 Flashcards
At the end of the fourth week,the primordial atrium is divided into right and left atria by the formation and subsequent moldification and fusion of two septa known as
Septa primum and the septa secundum
Three foramina are formed after the formation of the septum primum and the septum secundum, namely
Ostium primum
Ostium secundum
Foramen ovale
The right ventricle develops from —-?
The proximal I/3 of the bulbous cordis
The left ventricle develops from the ——
The primitive ventricle
What forms the middle I/3 of the bulbous cordis
The conus cordis
The distal 1/3 of the bulbous cordis is forms the
The truncus arteriosus
Truncus arteriosus gives rise to
The pulmonary truck and the aorta
The conus cordis forms
The right and left ventricular outflow
In fetal circulation what shunts blood from the pulmonary trunk to the descending aorta
Ductus arteriosus
What shunts blood from the umbilical vein to the inferior vena cava
Ductus venosus
In fetal circulation blood Is shunted from the right atrium to the left atrium by
The foramen ovale
Closure of the umbilical arteries after birth gives rise to
Medial umbilical ligament and superior vesicles arteries
Closure of the ductus venosus after birth gives rise to the
Ligamentum venosum
Closure of the foramen ovale gives rise to
fossa ovalis
