Intravenous Injection of Chemotherapy. It is very common for chemotherapy medications to be injected into a vein, or intravenously. In many cases, a nurse or doctor will insert a needle into your vein, often in your hand or arm, and the chemotherapy will be given through there.
5. Box Jellyfish. The Box Jellyfish is arguably the world's most toxic animal and is responsible for over 5,000 human casualties over the past 50 years. These pestilent creatures reside mainly in the waters near Australia, Japan, Hawaii, and the Phillipines.
One animal is more venomous than any other. Snakes are famous for their venom, and justifiably so. Injected directly into the flesh by inch-long fangs or needle-sharp harpoons, venom is weaponised chemistry. In any list of the world's most venomous animals, snakes often get top billing. Not all snakes are venomous, but certain groups have evolved to channel toxins through grooves or tubes in their teeth.