Assertion: atresia's blood | /r/CapableOf | improve the oxygenation of the blood
Facets:
value: greatly
type: DEGREE
Source sentences:
text: This operation is often performed at about 2 to 3 years of age, and allows all the oxygen-poor (blue) blood returning to the heart to passively flow into the pulmonary artery, greatly improving the oxygenation of the blood.