Venom is non-toxic if swallowed, but it becomes toxic when injected under the skin by numerous organisms such as snakes and spiders. This venom goes inside the tissues of the body that are typically protected by the skin, and therefore a snake bite can be harmful and sometimes even fatal.
Some animals are venomous because they can harm people with toxins that get inside the human body. Venom is contained in the organ of the animal that spreads. Poison is a dangerous substance that can inflict harm when eaten, swallowed, or inhaled. It is plants and animals that, when ingested, can be harmful to us humans.