Biochemistry, the emergence of the term could be dated back to the late 19th century or early 20th century, but its origins can be traced back farther. Its early history is a part of the early history of physiology and chemistry. For example, in the 1780s, A.-L. Lavoisier proved both breathing and combustion could be oxidation, while almost at the same time the scientists also found that plant respiration might be the reverse process of photosynthesis in nature. Reference: http://www.alfa-chemistry.com/cas_98516-30-4.htm.