What is the difference between venom and poison?

The terms venom and poison are often used interchangeably. Although both venomous and poisonous animals have potentially dangerous toxins in their bodies, the way that toxin is delivered differs. Venom is injected. Venomous animals have an active delivery system and may use their toxin for protection or to help them catch food. Unlike poisonous animals, venomous animals store their toxin in venom glands. They inject their toxin into their predator or prey using fangs, pinchers, spines, or any other sharp body part that is hollow, grooved or breaks the skin to introduce venom. Some venomous animals, such as the spitting cobra, can even squirt at an enemy and are accurate up to 10 feet!
Poison is eaten or absorbed. Poisonous animals have a passive delivery system and use their toxin for protection only. They store their toxin in their meat or skin. If someone or something eats the animal, the predator may get sick or even die. When this happens, you can be sure the predator won’t make that mistake again! An example of a poisonous animal is a poison dart frog.