Select the correct sequence of events that occur during inspiration
A) External intercostals and diaphragm contract, size of thoracic cavity increases, gas pressure in the lungs decreases, air flows in.
B) Internal intercostals and diaphragm contract, size of thoracic cavity increases, gas pressure in the lungs decreases, air flows in.
C) External intercostals and diaphragm contract, size of thoracic cavity increases, gas pressure in the lungs increases, air flows in.
D) Internal intercostals and diaphragm contract, gas pressure in the lungs decreases, size of thoracic cavity increases, air flows in.
Answer: A
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