Assertion: valve | /r/CapableOf | open in the direction of blood flow
Facets:
value: with each heartbeat
type: TEMPORAL
value: continuing to the lungs
type: TRANSITIVE-OBJECT
value: into the pulmonary artery
type: TRANSITIVE-OBJECT
Source sentences:
text: With each heartbeat, the valve opens in the direction of blood flow — into the pulmonary artery and continuing to the lungs — then closes to prevent blood from flowing backward into the heart's right ventricle.