Whether studies should be done on humans or animal is clearly an ethical question deciding what is morally right or wrong.If all concerned are satisfied that a patient fully understands and agrees to take part in an experiment or clinical trial many people would agree that it should take place because it ise often the only way of deciding whether a new drug or produceris beneficial. Animal experimentation on th other hand is totally different because with humans they decide whether they want to go through with or not but with animals they dont get to decide they have to do it anyway.