Assertion: atrium | /r/HasProperty | ridged by pectinate muscles
Facets:
Source sentences:
text: atrium proper anterior half of the chamber (anterior to crista terminalis) represents true auricular chamber of embryonic heart includes right auricle upper end of right atrium to the left of the SVC overlaps commencement of aorta and clasps infundibulum of right ventricle wall is ridged by pectinate muscles fanning out from crista terminalis and also extending into the right atrial appendage.