Assertion: giraffe's valve | /r/CapableOf | turn off the flow of blood
Facets:
value: to their necks
type: TRANSITIVE-OBJECT
Source sentences:
text: The anatomy of the giraffe is amazing if you consider they have a heart that weighs about 25 pounds, four chambers to the stomach, and valves that turn off the flow of blood to their necks when they bend down.