Phylum Nematoda Class Adenophorea Number of families 96
Primarily free-living marine, freshwater, and terrestrial nematodes; considered to be the most primitive form of nematodes
Photo: Trichina worm (Trichinella spiralis) in muscle tissue section. (Photo by Bob Gossington. Bruce Coleman, Inc. Reproduced by permission.)
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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.