HUMAN BODY I
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93
978-1-59339-797-5
Encyclopædia Britannica, Inc.
2008
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loginHow can we understand what we are?What are we made of? Are we awarethat all that we do—including readingthis book—is the work of a marvelousmachine? We know very little about how weare able to be conscious of our own actions;nevertheless, even though we are usually notvery aware of it, this community of organsthat is the body—an integrated system thatincludes the brain, heart, lungs, liver, kidneys,muscles, bones, skin, and endocrine glands—acts together in exquisitely regulatedharmony. It is interesting that variousmechanisms work together to keep thetemperature of the body at 98.6° F (37° C);tha
