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Difference between Poisonous and Venomous

Difference between Poisonous and Venomous

When most people hear the words “poisonous” and “venomous,” they may think that these terms are interchangeable. However, there is a big distinction between these two types of toxins. Ingesting or coming into contact with a poisonous substance can cause serious harm or death, while venomous substances are used by animals for protection or hunting. Let’s take a closer look at the differences between poisonous and venomous substances.

What is Poisonous?

Poisonous substances are substances that can cause harm to an organism when ingested, inhaled, or absorbed through the skin. These substances can be natural or man-made, and they can be found in plants, animals, and minerals.

  • While some poisonous substances are obviously harmful, others may not be immediately apparent as dangerous. For example, the poison ivy plant contains a substance called urushiol that can cause a severe allergic reaction in humans.
  • In small amounts, this substance is not harmful, but it can be very dangerous if someone comes into contact with a large amount of it. Similarly, many common household products, such as cleaning supplies and pesticides, contain poisonous chemicals that can be dangerous if used improperly.
  • Poisonous substances can also be found in nature, such as in certain types of mushrooms and berries. It is important to be aware of the potential dangers of these substances and to use them safely to avoid serious injury or death.

What is Venomous?

Venom is a poisonous substance that is produced by certain animals, typically snakes, spiders, and scorpions. It is injected into prey or predators by the animal’s bite or sting, and works to either kill or immobilize the victim. Venom can be extremely dangerous to humans, and even fatal in some cases. There are many different types of venomous animals, each with their own unique cocktail of toxins.

Some of the most deadly venoms are found in Australia’s inland taipan snake, the Pacific sea snake, and the yellow-bellied sea snake. Venomous animals are often feared by humans, but many of them play an important role in their ecosystem by helping to keep populations of other animals in check.

Difference between Poisonous and Venomous

Poisonous and venomous are terms that are often used interchangeably, but there is a distinction between the two. Poisonous refers to something that is harmful if ingested, inhaled, or absorbed through the skin.

  • In contrast, venomous animals have specialized organs that deliver venom to their victim through a bite or sting. The term “venom” is derived from the Latin word for “poison,” which reflects the fact that all venoms are poisonous.
  • However, not all poisons are venomous. Poison ivy, for instance, is poisonous but not venomous because it does not have any means of delivering its poison into the body of another creature.
  • Similarly, many snakes are venomous but not poisonous because their fangs are too small to penetrate human skin. Even among venomous creatures, there is variation in the toxicity of their venom.

For example, the venom of a honey bee is not typically fatal to humans, while the venom of a black mamba can kill a person within minutes. Understanding the difference between these two terms is essential for anyone who wishes to avoid harm from either type of substance.


While venomous substances are injected into prey or enemies to kill them, poisonous substances are ingested or absorbed. Many people use these words interchangeably, but there is a clear distinction between the two.

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