Johann Conrad Peyer was a Swiss anatomist who was a native of Schaffhausen

Schaffhausen

Schaffhausen is a city in northern Switzerland and the capital of the canton of the same name; it has an estimated population of 34,587 ....

. He studied medicine in Paris

Paris

Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

 under Guichard Joseph Duverney

Guichard Joseph Duverney

Guichard Joseph Duverney or Joseph-Guichard Du Verney was a French anatomist who was a native of Feurs in the province of Forez....

 (1648–1730), in Montpellier

Montpellier

-Neighbourhoods:Since 2001, Montpellier has been divided into seven official neighbourhoods, themselves divided into sub-neighbourhoods. Each of them possesses a neighbourhood council....

 under Raymond Vieussens

Raymond Vieussens

Raymond Vieussens was a French anatomist from Vigan. He studied medicine at the University of Montpellier where he earned his degree in 1670. He later became head physician at Hôtel Dieu Saint-Eloi in Montpellier...

 (1635–1713) and received his medical degree in 1681 at Basel

Basel

Basel or Basle In the national languages of Switzerland the city is also known as Bâle , Basilea and Basilea is Switzerland's third most populous city with about 166,000 inhabitants. Located where the Swiss, French and German borders meet, Basel also has suburbs in France and Germany...

. Later he returned to Schaffhausen to practice medicine. At Schaffhausen he performed research with Johann Jakob Wepfer

Johann Jakob Wepfer

Johann Jakob Wepfer was a Swiss pathologist and pharmacologist who was a native of Schaffhausen. He studied medicine in Strasbourg, Basel and Padua, and in 1647 returned to Schaffhausen to practice medicine. Here he maintained a practice that extended into southern Germany...

 (1620–1695), and Wepfer's son-in-law Johann Conrad Brunner

Johann Conrad Brunner

Johann Conrad Brunner was a Swiss anatomist from Diessenhofen. He studied medicine in Schaffhausen, Strasbourg and Paris. At Schaffhausen he studied under Johann Jakob Wepfer , who was also his father-in-law...

 (1653–1727).

in 1677 Peyer published Exercitatio anatomico-medica de glandulis intestinorum earumque usu et affectionibus, in which he describes the eponymous Peyer's patches. These anatomical structures are aggregated lymphatic nodules

Lymphatic system

The lymphoid system is the part of the immune system comprising a network of conduits called lymphatic vessels that carry a clear fluid called lymph unidirectionally toward the heart. Lymphoid tissue is found in many organs, particularly the lymph nodes, and in the lymphoid follicles associated...

 found in the lining of the small intestine

Small intestine

The small intestine is the part of the gastrointestinal tract following the stomach and followed by the large intestine, and is where much of the digestion and absorption of food takes place. In invertebrates such as worms, the terms "gastrointestinal tract" and "large intestine" are often used to...

. He was also the author of an important work on veterinary medicine

Veterinary medicine

Veterinary Medicine is the branch of science that deals with the prevention, diagnosis and treatment of disease, disorder and injury in non-human animals...

titled Merycologia sive de Ruminantibus et Ruminatione Commentariae.