Assertion: leech's saliva | /r/MadeOf | substance
Facets:
Source sentences:
text: The leech’s saliva contains substances that anesthetize the wound area, dilate the blood vessels to increase blood flow, and prevent the blood from clotting.
text: The saliva of the leech contains substances that anesthetize the wound area (rendering the bite virtually painless) and dilate blood vessels to increase blood flow to the site of the bite.