Microbiology: Principles and Explorations 9th Edition

Published by Wiley
ISBN 10: 1-11874-316-4
ISBN 13: 978-1-11874-316-4

Chapter 21 - Diseases of the Respiratory System - Self Quiz - Page 687: 2

Answer

(a) Lungs

Work Step by Step

Lungs are normally free of microorganisms. But the nasal cavity, pharynx, trachea and bronchi usually contain microorganisms.
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