Leonardo da Vinci was not called a scientist in his time and his anatomical discoveries were unknown as well. Many of his experiments and studies (specifically dissecting human beings) were deemed holy in the eyes of the church in the first place so they were shunned by the general public. On top of that, he did not speak Latin (which was the universal language of the scientists at the time) so he could not share his discoveries with anyone.  However, Leonardo's scientific work is important to history because it impacted how scientists work. His main discovery, being the scientific method.  His work in anatomy goes from how the human eye works and sees light or color to the cardiovascular system and more. In fact, if you were to compare one of Leonardo's journals on anatomy to a present day textbook on anatomy, they would most likely contain the same information. His notes, still, are being used to come up with new medical advancements, proving he was, and still is, very important to history.