Human body of different cavities, separated areas which house different organ systems. The brain and central nervous system reside in an area protected from the rest of the body by the blood brain barrier. The lungs sit in the pleural cavity. The intestines, liver, and spleen sit in the abdominal cavity Height, weight, shape and other body proportions vary individually and with age and sex. Body shape is influenced by the distribution of muscle and fat tissue. Human physiology is the study of how the human body functions. This includes the mechanical, physical, bioelectrical, and biochemical functions of humans in good health,
Henri-Étienne Beaunis articulations, myology, viscera, senses, the human body in general, and embryology. Bouchard wrote the sections on angiology and neurology. In 1870 and 1871, Beaunis underwent the Franco-Prussian War which led to the French side losing a part of Alsace-Lorraine. In 1871, he published in the "Gazette médicale de Paris" extracts of his diary describing his life during this period and more specifically during the Siege of Strasbourg. He described the intellectual climate that was developing before the war and the progressive opening to scientific dialogs both in Germany and France, especially in the fields of physiology and medicine. After his