Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Miguel Rolando Covian, was an Argentine-Brazilian physiologist, medical educator and writer. Covian was born in Rufino, Santa FÃ© Province, Argentina, on September 7, 1913. He studied at the Faculty of Medicine of the University of Buenos Aires, where, while a student, he worked also as a teaching assistant in the Chair of Physiology. He graduated in 1942 and soon thereafter started a full time career in research on Physiology, initially in collaboration with Bernardo Houssay, the great Argentine physiologist, who later was awarded with the 1947 Nobel Prize in Medicine and Physiology for his investigations on the interaction between the hypophysis and the pancreas in the control of glucose metabolism.