Animals should be used for Medical Research Human beings have used animals for a variety of purposes including research. Animals have been used for transportation, sports companionship and more so many animals have been killed for food. Animals have been used in research to aid in understanding of living things and illness that afflict human beings and other animals. Studying of animals enhance researchers to obtain information that is impossible to learn in other way. The development of new drug and surgical techniques can not be directly used on humans due to the possibility of it causing harm than good, but they are tried on animals first to determine their safety and effectiveness.