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Overview of the Respiratory System

Overview of the Respiratory System

Bronchial tubes and their branches can be seen in this normal chest x-ray.
© Thomas Hecker.

The respiratory system, composed of lungs, airways, respiratory muscles and blood vessels, serves as the mechanism that brings oxygen into the body and release CO2 out of the body.




Author(s): Nancy Moreno, PhD, Deanne Erdmann, MS, and Sonia Rahmati Clayton, PhD
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Ecological Importance of Protists

Ecological Importance of Fungi

Importance of Plants to Humans

Vertebrate Animals

How Were Viruses First Discovered? 2

What Organisms and Host Cells Do Viruses Infect?

The Reproductive Cycle of a Retrovirus—HIV

Which Human Diseases Are Caused By Viruses?

How Can Viral Diseases Be Prevented and Treated?

How Do New Viruses Emerge?

Are There Infectious Agents Simpler Than Viruses?


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