Assertion: heart | /r/CapableOf | return to the heart
Facets:
value: before delivering the oxygenated blood
type: TEMPORAL
Source sentences:
text: Mammals and birds (and some reptiles) have what is known as a double-loop circulatory system , where blood leaves the heart, goes to the lungs where it becomes oxygenated and then returns to the heart before delivering the oxygenated blood to the rest of the body.