Wasp sting with a droplet of<unk> <unk>  is a type of toxin produced by an animal that is actively delivered in a bite, sting, or similar action. The toxin is delivered through a specially evolved<unk>  apparatus, such as fangs or a stinger, in a process called envenomation.<unk>  is often distinguished from poison, which is a toxin that is passively delivered by being ingested, inhaled, or absorbed through the skin.<unk>  has evolved in terrestrial and marine environments and in a wide variety of animals: both predators and prey, and both vertebrates and invertebrates.<unk> s kill through the action of at least four major classes of toxin, namely necrotoxins and cytotoxins, which kill cells; neurotoxins, which affect nervous systems; myotoxins, which damage muscles; and haemotoxins, which disrupt blood clotting.<unk> ous animals cause tens of thousands of human deaths per year.<unk> s are often complex mixtures of toxins of differing types. Toxins from<unk>  are used to treat a wide range of medical conditions including thrombosis, arthritis, and some cancers. Studies in<unk> ics are investigating the potential use of<unk>  toxins for many other conditions.
Venom
Body fluid
Blood
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Clinic
Heart
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