How does antivenin work?

Some snakes make a chemical in their bodies called venom. They use it to hunt and protect themselves. Sometimes, if a human gets bitten by a snake, they need to take a special medicine called antivenin.  How does this medicine work? We asked pediatrician Emma Gerstenzang to help us find the answer. Got a question that’s snaking around in your brain? Send it to us at BrainsOn.org/contact, and we’ll help find a sssssatisfying answer!