Which organ protects the body from toxins?

The skin is an essential organ that plays a critical role in protecting the body from toxins. It serves as a barrier against external substances, including environmental pollutants, bacteria, and harmful chemicals. The skin's surface contains layers of cells that can prevent the absorption of many harmful agents, effectively keeping them out of the body.

Additionally, skin is involved in the process of excretion, helping to remove certain toxins through sweat. It acts not only as a physical barrier but also as a complex organ involved in immune responses, thereby contributing to the overall detoxification process.

While the liver and kidneys are also crucial in detoxifying and filtering substances from the body, the question specifically asks about protection from toxins, which aligns most directly with the skin’s protective role. The heart, on the other hand, is primarily involved in circulation and does not function directly in the detoxification process.