Physiology - Research Article from Macmillan Science Library: Animal Sciences

This encyclopedia article consists of approximately 4 pages of information about Physiology.
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Structure

The structures of living things are often related to their function. For example, the shape and structure of a bird's beak is related to how it uses the beak. Eagles have a large, sharp beak for ripping and tearing prey. Hummingbirds have long, slender beaks for sipping nectar from flowers. Physiologists often study and compare animal structures such as appendages (projecting structures or parts of an animal's body that are used in movement or for grasping objects) to determine similarities, differences, and evolutionary etiology (origin) among species.

Information Transfer

Animals react quickly to external stimuli such as temperature change, touch, light, and vibration. Information from an organism's external environment is rapidly transferred to its internal environment. In vertebrates, nerve impulses initiated in sensory neurons, or nerve cells, are transferred to the center of the brain or spinal cord. Sensory neurons are nerve cells that transmit impulses from a...

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This section contains 1,006 words
(approx. 4 pages at 300 words per page)
Buy the Physiology Encyclopedia Article
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Macmillan Science Library: Animal Sciences
Physiology from Macmillan Science Library: Animal Sciences. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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