Assertion: vessel | /r/CapableOf | open to allow oxygen and nutrient supplies
Facets:
value: only occasionally
type: DEGREE
Source sentences:
text: During sleep or rest periods, vessels in both areas are largely closed; they open only occasionally to allow oxygen and nutrient supplies to travel to the tissues to maintain basic life processes.
text: During sleep or rest periods, vessels in both areas are largely closed; they open only occasionally to allow oxygen and nutrient supplies to travel to the tissues to maintain basic life processes.