Assertion: owl | /r/HasAspect | air-cushioned vessel casings
Facets:
Source sentences:
text: They have alternative blood vessels routing blood to the head, blood pooling systems to keep blood circulating to and from the brain when their neck movement cuts off circulation, and air-cushioned vessel casings so they don't rupture a blood vessel when snapping their neck around 135 degrees to look over their left shoulder.