Observations and dissections of modern medical sciences first took place in the 17th century. English physician William Harvey used animals to study the circulatory system. In the 18th century, Antoine Lavoisier first used guinea pigs in experiments in respiration. Otto Loewi, Edgar Adrian, and David Hubel made advances in neurology and the study of vision.
These basic scientific advancements gave way to many more in medicine. Yet, these advances and their respective testing are under major scrutiny. These debates over the rights of animals can be divided into