Assertion: valve's opening | /r/HasProperty | the foramen ovale
Facets:
Source sentences:
text: The fossa ovalis marks the spot where an opening, the foramen ovale, existed in the fetal heart.
text: The interatrial septum has an opening in the right atrium, the foramen ovale, which provides access to the left atrium; this connects the two chambers, which is essential for fetal blood circulation.