Human Respiratory System Answer Key
Investigate how the lungs and respiratory system deliver oxygen to the body and remove carbon dioxide.
Looking for Human Respiratory System answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Human Respiratory System Gizmo.
✅ 100% Free • Step-by-step explanations • Perfect for homework help • Covers all activities • Updated for 2026
Prior Knowledge Questions
Q1.What is the main function of the respiratory system?
The main function is to bring oxygen into the body and remove carbon dioxide through breathing.
Q2.What is the role of the diaphragm?
The diaphragm is a dome-shaped muscle that contracts and relaxes to control breathing by changing the volume of the chest cavity.
Activity A – Gas Exchange
Q3.Where does gas exchange occur in the lungs?
Gas exchange occurs in the alveoli, tiny air sacs surrounded by capillaries.
Q4.What gas moves from the alveoli into the blood?
Q5.What gas moves from the blood into the alveoli?
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