Title: Human body
Content:  The study of human physiology began with Hippocrates in Ancient Greece, around 420 BCE, and with Aristotle (384–322 BCE) who applied critical thinking and emphasis on the relationship between structure and function. Galen (ca. 126–199) was the first to use experiments to probe the body's functions. The term physiology was introduced by the French physician Jean Fernel (1497–1558). In the 17th century, William Harvey (1578–1657) described the circulatory system, pioneering the combination of close observation with careful experiment. In the 19th century, physiological knowledge began to accumulate at a rapid rate with the cell theory of Matthias Schleiden and Theodor Schwann in 1838, that organisms are made up of cells. Claude Bernard (1813–1878) created the concept of the milieu interieur (internal environment), which Walter Cannon (1871–1945) later said was regulated to a steady state in homeostasis. In the 20th century, the physiologists Knut Schmidt-Nielsen and George Bartholomew extended their studies to comparative physiology and ecophysiology. Most recently, evolutionary physiology has become a distinct subdiscipline.
Title: Physiology
Content:  be taken up and championed as "homeostasis" by American physiologist Walter B. Cannon in 1929. By homeostasis, Cannon meant "the maintenance of steady states in the body and the physiological processes through which they are regulated." In other words, the body's ability to regulate its internal environment. William Beaumont was the first American to utilize the practical application of physiology. Nineteenth-century physiologists such as Michael Foster, Max Verworn, and Alfred Binet, based on Haeckel's ideas, elaborated what came to be called "general physiology", a unified science of life based on the cell actions, later renamed in the 20th century as cell biology.
Title: Physiology
Content:  Jean Fernel (1497–1558), a French physician, introduced the term "physiology". Galen, Ibn al-Nafis, Michael Servetus, Realdo Colombo, Amato Lusitano and William Harvey, are credited as making important discoveries in the circulation of the blood. Santorio Santorio in 1610s was the first to use a device to measure the pulse rate (the pulsilogium), and a thermoscope to measure temperature. In 1791 Luigi Galvani described the role of electricity in nerves of dissected frogs. In 1811, César Julien Jean Legallois studied respiration in animal dissection and lesions and found the center of respiration in the medulla oblongata. In the same year, Charles Bell finished work 
Title: Outline of physiology
Content:  History of physiology
Title: Pathophysiology
Content:  In Germany in the 1830s, Johannes Müller led the establishment of physiology research autonomous from medical research. In 1843, the Berlin Physical Society was founded in part to purge biology and medicine of vitalism, and in 1847 Hermann von Helmholtz, who joined the Society in 1845, published the paper "On the conservation of energy", highly influential to reduce physiology's research foundation to physical sciences. In the late 1850s, German anatomical pathologist Rudolf Virchow, a former student of Müller, directed focus to the cell, establishing cytology as the focus of physiological research, while Julius Cohnheim pioneered experimental pathology in medical schools' scientific laboratories.
Title: History of biochemistry
Content:  Animal chemistry, or, Organic chemistry in its applications to physiology and pathology, which presented a chemical theory of metabolism, or even earlier to the 18th century studies on fermentation and respiration by Antoine Lavoisier. The term “biochemistry” itself is derived from the combining form bio-, meaning "life", and chemistry. The word is first recorded in English in 1848, while in 1877, Felix Hoppe-Seyler used the term (Biochemie in German) in the foreword to the first issue of Zeitschrift für Physiologische Chemie (Journal of Physiological Chemistry) as a synonym for physiological chemistry and argued for the setting up of institutes dedicate 
Title: The Journal of Physiology
Content:  The Journal of Physiology was first published in 1878 and edited by Michael Foster. In 1893–94 Foster's colleague John Newport Langley took over as editor. Langley remained the proprietor and editor until his death in 1925, when The Physiological Society bought the journal from his widow. Charles Scott Sherrington was appointed the first chairman of the editorial board in 1926. In 2003 The Physiological Society moved publishing to Blackwell, now Wiley-Blackwell. The journal is published online via the Wiley Online Library. In 2000-2005, the journal published fraudulent research authored by Igor Dhuza, a senior research associate in Vanderbilt University's Department of Biomedical Engineering.
Title: Biology
Content:  and French (biologie). Historically there was another term for biology in English, lifelore; it is rarely used today. The Latin-language form of the term first appeared in 1736 when Swedish scientist Carl Linnaeus (Carl von Linné) used biologi in his Bibliotheca Botanica. It was used again in 1766 in a work entitled Philosophiae naturalis sive physicae: tomus III, continens geologian, biologian, phytologian generalis, by Michael Christoph Hanov, a disciple of Christian Wolff. The first German use, Biologie, was in a 1771 translation of Linnaeus' work. In 1797, Theodor Georg August Roose used the term in the preface of a book, Grundzüge der Lehre van der Lebenskraft. Karl Friedrich Burdach 
Title: The Physiological Society
Content:  The Physiological Society was founded in 1876 as a dining society "for mutual benefit and protection" by a group of 19 physiologists, led by John Burdon Sanderson and Michael Foster, as a result of the 1875 Royal Commission on Vivisection and the subsequent 1876 Cruelty to Animals Act. Other founding members included: William Sharpey, Thomas Huxley, George Henry Lewes, Francis Galton, John Marshall, George Murray Humphry, Frederick William Pavy, Lauder Brunton, David Ferrier, Philip Pye-Smith, Walter H. Gaskell, John Gray McKendrick, Emanuel Edward Klein, Edward Schafer, Francis Darwin, George Romanes, and Gerald Yeo. The aim was to promote the advancement of physiology. Charles Darwin and William Sharpey were elected as the society's first two Honorary Members. The society first met at Sanderson's London home. The first rules of the society offered membership to no more than 40, all of whom should be male "working" physiologists. Women were first admitted as members in 1915 and the centenary of this event was celebrated in 2015. Michael Foster was also founder of The Journal of Physiology in 1878, and was appointed to the first Chair of Physiology at the University of Cambridge in 1883. The archives are held at the Wellcome Library.
Title: Physiology, Physiological Chemistry, Pharmacology
Content:  Physiology, Physiological Chemistry, Pharmacology, with the parallel German title Berichte Physiologie, physiologische Chemie und Pharmakologie, was a German medical journal with a focus on physiology, physiological chemistry and pharmacology, published by Springer. It was established by Carl Oppenheimer, Paul Ehrlich, Emil Fischer, Albrecht Kossel, Ernst Leopold Salkowski and Nathan Zuntz in 1902, originally titled Biochemisches Zentralblatt and later retitled Zentralblatt für Biochemie und Biophysik. It was retitled Berichte über die gesamte Physiologie und experimentelle Pharmakologie in 1920, which is sometimes known as Rona's Berichte, and received its final title in 1969. It ceased publication in 1980.

Question: who used the word physiology for the first time?
Answer: Jean Fernel.