Assertion: hippo's valve | /r/CapableOf | aid submerging underwater
Facets:
Source sentences:
text: The ears and nostrils of pygmy hippos have strong muscular valves to aid submerging underwater, and the skin physiology is dependent on the availability of water.
text: The ears and nostrils of pygmy hippos have strong muscular valves to aid submerging underwater, and the skin physiology is dependent on the availability of water.