Plant toxins are naturally occurring chemicals found in various plants that can be harmful to humans and animals. These toxins serve as a defense mechanism against herbivores and pests, deterring them from eating the plants. Common examples include alkaloids, glycosides, and oxalates, which can cause symptoms ranging from mild irritation to severe poisoning. Some plants, like poison ivy and oleander, contain potent toxins that can lead to serious health issues if ingested or touched. While many plants have beneficial properties, it is essential to recognize and respect the potential dangers of plant toxins to ensure safety in both wild and cultivated environments.