Rats, for example, produce their own vitamin C while humans must supplement vitamin C through diet. Mice breathe through their noses, their protein requirements are higher than humans, their pulse and blood factors all differ significantly from humans (Newkirk 215). Small progress has been made in curing the major diseases affecting humans. People are still dying and animals are still suffering! With the reliability of animal studies in question, scientists should seek non-animal alternatives. Scientists who regularly use animals in their research would say that innovations in the medical field would stop. I recognize that changes would need to be made and that change would not happen overnight, but I am certain that alternatives are possible and are the right choice. Some have argued that eliminating animal studies would also eliminate a controlled environment, but they do not consider the possibilities of experimentation on human tissue in vitro or in test tubes, nor how this would constitute a solution to this problem. Human cells can easily be obtained or collected by surgery, biopsy, or autopsy, and with technology, many of these cells or tissues can be preserved indefinitely (Greek 101-102). Another less invasive option would be to conduct autopsies. Autopsies exclude moral implications because they would be performed by people to gain knowledge in the medical field.