Cardiac Embryonic-Fetal Circulation Flashcards
The precardiac cells arise from the _____________.
middle layer of the mesoderm
_______ migrate through the _________, giving rise to the intraembryonic mesoderm.
Epiblast; primitive streak
The heart arises from the __________, an area that is initially the most cephalic structure in the gastrula.
cardiogenic area
The cardiogenic area forms __________.
two tubes that then get lined with endothelium
By day ________, the primitive heart tube is formed.
21-22
Cardiac jelly plays a role in the looping of the heart; it is located between __________.
the inner (endothelial) and outer (myocardium and epicardium) layers
During looping of the heart, the atria rotate _____________.
posteriorly
Initially, the ventricular outflow tracts are both attached to the ____________.
right ventricle
Septation begins at day _________.
26-28
The truncus arteriosus becomes the _________.
aorta and pumonary artery and semilunar valves
Normally, the heart loops to the ________.
right (D-loop)
The bulbus cordus becomes the __________.
right ventricle
The primitive ventricle becomes the __________.
left ventricle
The atria are derived from the _________.
sinus venosus
Blood enters the sinus venosus through three veins: ____________.
umbilical vein (blood from the mother), cardinal vein (deoxygenated blood from the fetus), and the vitelline vein (from the yolk sac)
