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.
Nowadays more and more animals used in the scientific research. Some people believe that it is unnecessary and unacceptable as the animals are also the beautiful creature of God while others think that these experiments are necessary to make human life easier and comfortable.