Snake venom

Snake venom is highly modified saliva containing zootoxins that facilitate the immobilization and digestion of prey and defense against threats. It is injected by unique fangs during a bite, and some species are also able to spit their venom.

Snake venom is the poisonous, typically yellow fluid stored in the modified salivary glands of venomous snakes.
There are hundreds of venomous snake species that rely on the venom they produce to debilitate and immobilize their prey. Venom is composed of a combination of proteins, enzymes, and other molecular substances.

These toxic substances work to destroy cells, disrupt nerve impulses, or both. Snakes use their venom cautiously, injecting amounts sufficient to disable prey or to defend against predator.