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PTECH Anatomy QUESTION #3109
Question 1
What is the primary muscle involved in 'Inspiration' (breathing in)?
  • Intercostal muscle
  • Diaphragm✔️
  • Abdominal muscle
  • Pectoralis major
Correct Answer Explanation
When the diaphragm contracts and flattens, the volume of the thoracic cavity increases, drawing air in.