The skin is richly supplied with sensory receptors serving the modalities of touch (light and deep pressure), temperature (warm and cold), and pain, as well as the more compli-
Receptor intensity intensity
Environmental stimulus (e.g., temperature)
Analog signal (varying voltage)
Transmitted FM signal (varying frequency)
Physical system *
Transmission line g e D
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.