Question

The most important muscular structure in respiratory system of rabbit is

• A. External intercostal muscles
• B. Internal intercostal muscles
• C. Diaphgram
• D. Vertebral column

Answer 1

Answer: (C)

Diaphgram

The diaphragm is the dome-shaped sheet of muscle and tendon that serves as the main muscle of respiration and plays a vital role in the breathing process. The diaphragm separates the thoracic cavity containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs.

Hence the correct option is C.