Regnier de Graaf

Regnier de Graaf (b. July 30th, 1641 in Schoonhoven, Netherlands; d. August 17th, 1673 in Delft, Netherlands), his first name is often spelled Reinier or Reynier), was a Dutch physician and anatomist. Regnier de Graaf, Dutch anatomist. ... July 30 is the 211th day (212th in leap years) of the year in the Gregorian Calendar, with 154 days remaining. ... Jump to: navigation, search Events The Long Parliament passes a series of legislation designed to contain Charles Is absolutist tendencies. ... Schoonhoven (population: 12,303 in 2004) is a city in the western Netherlands, in the province of South Holland. ... August 17 is the 229th day of the year (230th in leap years) in the Gregorian Calendar. ... Events The English Test Act was passed. ... Delft City Hall (Stadhuis) Delft is a city in South Holland (Zuid-Holland), the Netherlands, located halfway between Rotterdam and The Hague (Den Haag). ... Physician examining a child The word physician should not be confused with physicist, which means a scientist in the area of physics. ... Anatomical drawing of the human muscles from the Encyclopédie. ...

After studying medicine in Utrecht and Leiden, where he submitted his doctoral thesis on the pancreas, De Graaf went to France where he obtained his medical degree from the University of Angers. While in Paris he also turned to the study of the male genitalia, which led to a publication in 1668. Back to the Netherlands in 1667, De Graaf established himself in Delft. Since he was a catholic in a mainly Protestant country, he was unable to follow a university career. After the early death of a son, De Graaf died in August 17th, 1673, at 32 years of age and was buried in the Oudekerk in Delft. The reason for his death is unknown; recent speculation that he may have committed suicide is entirely unfounded. A few months before his death, De Graaf recommended, as a member of the Royal Society in London attention to Antonie van Leeuwenhoek and his excellent microscopes. Utrecht is a municipality and the capital city of the Dutch province of Utrecht. ... Leiden (in English also, but now rarely, Leyden) is a city and municipality in South Holland, The Netherlands. ... Delft City Hall (Stadhuis) Delft is a city in South Holland (Zuid-Holland), the Netherlands, located halfway between Rotterdam and The Hague (Den Haag). ... Protestantism is a general grouping of denominations within Christianity. ... August 17 is the 229th day of the year (230th in leap years) in the Gregorian Calendar. ... Events The English Test Act was passed. ... The Royal Society of London for the Improvement of Natural Knowledge, known simply as the Royal Society, is claimed to be the oldest learned society still in existence. ... London is the capital city of the United Kingdom and of England. ... Anton von Leeuwenhoek Anton van Leeuwenhoek (October 24, 1632 _ August 26, 1723) was a tradesman and scientist from Delft, in the Netherlands. ... Jump to: navigation, search 1852 microscope Compound microscope made by John Cuff in 1750 A microscope (Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. ...

De Graaf is famous for having realised the function of the ovarian follicle (which is named Graafian follicle in his honour, although others, including Falopius, had noticed the follicles previously), described the anatomy of the testicles and collected secretions of the gall bladder and the pancreas. Ovarian follicles or Graafian follicles (after Regnier de Graaf) are the roughly spherical cell aggregations in the ovary containing an ovum and from which the egg is released during ovulation. ... An eponym is a person, whether real or fictitious, whose name has (or is thought to have) given rise to the name of a particular place, tribe, discovery, or other item. ... Jump to: navigation, search Human male anatomy The testicles, known medically as testes (singular testis), are the male generative glands in animals. ... The gallbladder (or cholecyst) is a pear-shaped organ that stores bile (or gall) until the body needs it for digestion. ... Jump to: navigation, search The pancreas is a retroperitoneal organ that serves two functions: exocrine - it produces pancreatic juice containing digestive enzymes endocrine - it produces several important hormones // Anatomy The pancreas is a retroperitoneal organ located posterior to the stomach on the posterior abdominal wall. ...

The Ovary by Reinier de Graaf

Ectopic pregnancy by Reinier de Graaf, copied, as he acknowledged, from an earlier French publication

From the observation of pregnancy in rabbits, he concluded that inside a follicle an oocyte had to be present, although he never observed it. De Graaf also described the function of the Fallopian tubes and deduced the consequences of hydrosalpinx on fertility. . The ovary by Reignier de Graaf This image is in the public domain because its copyright has expired in the United States and those countries with a copyright term of life of the author plus 100 years. ... The ovary by Reignier de Graaf This image is in the public domain because its copyright has expired in the United States and those countries with a copyright term of life of the author plus 100 years. ... Human female internal reproductive anatomy Ovaries are a part of a female organism that produces eggs. ... Ectopic by R. de Graaf This image is in the public domain because its copyright has expired in the United States and those countries with a copyright term of life of the author plus 100 years. ... Ectopic by R. de Graaf This image is in the public domain because its copyright has expired in the United States and those countries with a copyright term of life of the author plus 100 years. ... An oocyte or ovocyte is a female gametocyte that divides twice by mitosis and meiosis into two other oocytes or into two ootids. ... Female internal reproductive anatomy The Fallopian tubes or oviducts are two very fine tubes leading from the ovaries of female mammals into the uterus. ... Fertility is the ability of people or animals to produce healthy offspring in abundance. ...

References

• Houtzager HL. Reinier de Graaf 1641-1673 (Dutch). Rotterdam: Erasmus publishing, 1991. ISBN 90-5235-021-3.

External link

• Short biography
• Britannica entry