Multiple Choice
Which structure is NOT part of the respiratory system?
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22. The Respiratory System
Introduction to Lung Physiology
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In introductory lung physiology, which organ system is primarily responsible for keeping the blood continuously supplied with oxygen by enabling gas exchange in the lungs?
A
Digestive system
B
Cardiovascular system
C
Respiratory system
D
Urinary system
Verified step by step guidance1
Identify the main function described in the problem: supplying blood continuously with oxygen through gas exchange in the lungs.
Recall that gas exchange in the lungs involves oxygen entering the blood and carbon dioxide leaving it, a process that occurs in the alveoli of the lungs.
Understand that the organ system responsible for this gas exchange is the Respiratory system, which includes the lungs and airways.
Differentiate the Respiratory system from other systems mentioned: the Digestive system processes food, the Cardiovascular system transports blood but does not perform gas exchange itself, and the Urinary system removes waste from the blood.
Conclude that the Respiratory system is primarily responsible for maintaining oxygen supply in the blood by enabling gas exchange in the lungs.
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