Question

Lungs lie in the thoracic cavity separated by .......... from the abdominal cavity.

• A. Diaphragm
• B. Ribs
• C. Stomach
• D. None of the above

Answer 1

The correct option is A Diaphragm

Lungs lie in the thoracic cavity separated by a dome-shaped muscular structure known as a diaphragm. It contracts during inspiration to increase the volume of thoracic cavity which decreases the air pressure and leads to inspiration. It relaxes during expiration to decreases the volume of thoracic cavity which increase the air pressure which leads to expiration.
Therefore, the correct answer is option A.