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Get Answers to all your Questions
What is the role of the diaphragm in inspiration?
Option: 1
It contracts to pull the ribs and sternum outwards
Option: 2
It relaxes to decrease the volume of the thoracic cavity
Option: 3
It contracts to flatten and increase the volume of the thoracic cavity
Option: 4
It relaxes to pull the ribs outwards and sternum inwards
Answers (1)
During inspiration, the diaphragm contracts and flattens, which increases the volume of the thoracic cavity and creates a pressure gradient for the movement of air into the lungs. Hence, option 3 is the correct answer.
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