the.com/secretion
the body's polite way of saying it made something and wants it gone
saliva outputabout 1.5 liters produced daily, mostly swallowed unnoticed
venom countssnake venom is modified saliva secreted to kill
tear typesemotional tears chemically differ from onion-induced ones
sweat glandsroughly 2 to 4 million cover human skin
silk sourcespiders secrete liquid protein that hardens into thread