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Which of the following muscles contracts to pull the ribs outwards during inspiration?
Option: 1
Sternocleidomastoid
Option: 2
Pectoralis minor
Option: 3
Both a and b
Option: 4
None of the above
Answers (1)
The pectoralis minor muscle contracts during inspiration to pull the ribs outwards and increase the volume of the thoracic cavity.
Option 2 is the correct answer.
View full answer
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