Assertion: heart's function | /r/HasProperty | to protect animal
Facets:
value: from the hazards of their environment
type: TRANSITIVE-OBJECT
Source sentences:
text: The most obvious function of the integumentary system is to protect animals from the hazards of their environment, but it's also indispensable for temperature regulation (a coating of hair or feathers helps to preserve internal body heat), protection from predators (