What animals are associated with medicine?

People began to use animals to work and make their work easier. Man invented different medicines, but of course, it was impossible to conduct research on living people. Then people came up with the idea of ​​breeding small animals: mice, rats, frogs, and experiments were already carried out on them. Animals can also be donors. For example, the organs of a pig can be transplanted to a sick person, and these organs take root well in the new body.
Snake venom is used medicinally as a cure for many diseases. They are also used as medicines and food additives, fats: badger, fish. Also, for pain in the lower back, doctors came up with the idea of ​​using a belt made of dog hair.
Animals play an important role in medicine: experiments are performed on them, medicines are made, organs are used.