Dutch physician and anatomist born in Schoonhoven, Neth., who discovered and described the ovarian follicle (1673), also known as the Graaphian follicle, where the individual cells, the eggs, were formed, ruling that, as much as the oviparous, the viviparous were born from an egg, in addition to researching the juice pancreatic. He studied at the University of Angers, France, where he obtained his M.D. (1665).
As a student, he was the first to obtain pancreatic secretion. By opening a dog's duodenum, he was able to catheterize Wirsung's duct with the hollow shaft of a feather and obtain pure pancreatic juice. Until then, the function of the pancreas was unknown, considered as a support for the stomach or an organ of convergence of quilliferous vessels. His experience with pancreatic fistula was only repeated by Claude Bernard in the 19th century.
She settled in Delft (1967) where she practiced medicine and wrote her famous treatise on the pancreas (1663) and where she also died at just 32 years of age. He also projected himself with important studies on the reproductive organs of mammals. She studied in detail the anatomy of the male and female sex organs and described the phenomenon of ovulation and the follicles ovaries that contain the maturing eggs, now known as Graafian follicles, as the name given by Haller (1730).
He also left a treatise on enemas, a therapeutic method widely used at the time. Enema or enema is a therapeutic practice in which a liquid medicated or, today, a substance for radiological contrast, is introduced into the rectum. The woman specialized in applying enemas was called a cristeleira.
Source: http://www.dec.ufcg.edu.br/biografias/
Order R - Biography - Brazil School
Source: Brazil School - https://brasilescola.uol.com.br/biografia/reiner-graaf.htm