Animal testing is a phrase that most people have heard but are perhaps still unsure of exactly what it involve. Whether it is called animal testing, experimentation or research, it should be defined as all testing methods on animals including, medical exploration, cosmetics, toxicology trialing, and psychological examination involving animal subjects. It is used to assess the safety and effectiveness of medications and beauty products as well as understanding how the human physiology works. While supporters believe it is necessary practice, those against animal testing believe that it involves torture and suffering to animals. Medical research is the hardest case of proposition in the debate whether animal testing should be banned or not, since it has previously yielded substantial benefits for humanity. Throughout moral, humanistic, and social perspectives animal testing is beneficial for medical evolution. Animals ' rights are of less moral worth than human rights. Humans are complex beings with large well developed brains, which form sizeable social groups, have significant ability to communicate with one another, and possess desires, preferences and interests about the world. Humans have an awareness of their own existence and mortality, and as such are beings worthy of moral consideration. According to Pycroft (2011), “Without access to live organisms we would know far less bout the function of the cardiovascular, how digestion works…Thus, if we value progression of