Assertion: vampire bat's saliva | /r/MadeOf | chemical
Facets:
Source sentences:
text: Their saliva contains chemicals that prevent the blood from clotting and also numb the skin around the bite so that their food source will not feel anything during the feeding.
text: The saliva of the vampire bats contain chemicals that prevent the clotting of the blood of the victim; this has been used to develop drugs to help the patients of strokes and heart attacks.