Animal research has played a major role in the past one hundred years by improving the lives of humans and animals. Even though the topic of animals used in biomedical research is very controversial to some people or groups the outcome of using animals in testing facilities has lead to almost every medical advance in the past decade.
When animals are used for testing, we inflict sever pain on them. This brings a question of should animals be used for research? Using the animals for research is a common practice. They have a live body whose functions and physiology are similar to humans.