title: Fundamentals of Human Physiology
author: Stuart Fox
description: Stuart Fox is a professor at Pierce College in Los Angeles. He received his Ph.D. from the University of Southern California in Medical Physiology. In addition to his work on this text, he is the co-author of Concepts of Human A&amp;P, Synopsis of Anatomy &amp; Physiology, several lab manuals, and numerous research papers.
zlib_text: 191
  Claude Bernard, a French physiol-
  ogist, realized in 1859 that while
  animals, such as humans, live in
  an external environment, the cells
  of the body are surrounded by an
  internal environment composed
  of tissue ﬂuid, which is serviced
  by blood. Later, Walter Cannon,
  an American physiologist, intro-
  duced the term homeostasis to
  emphasize the dynamic equilib-
  rium that keeps the composition
  of tissue ﬂuid, and various vital
  signs like blood pressure and
  body temperature, within normal
  limits. The systems of the body
  discussed in this part either add
  substances to and/or remove sub-
  stances from the blood. In this way,
  they contribute to homeostasis. 
  Maintenance of the Human Body
  11
  Human Organization
  193
  Humans are organized. A limited number
  of tissues make up organs that form
  systems. Organ systems work together to
  maintain homeostasis.
  13
  Cardiovascular System
  239
  One of the cardiovascular system’s main
  functions is to transport nutrients to and
  carry wastes away from the body’s 