Question

The central compartment of the thoracic cavity between the pleural sacs of the two lungs is known as:

• A. Pleural cavity
• B. Rima glottidis
• C. Mediastinum
• D. Thoracic cavity

Answer 1

The correct option is C Mediastinum

The interval between the two pleural sacs of the both the lungs is known as mediastinum, thereby separating the lungs in the thoracic cavity. This space contains the heart, oesophagus, trachea, remnants of the thymus, thoracic duct of the lymphatic system, etc.

The pleural cavity is the very narrow space between the visceral pleura and parietal pleura, which encloses each of the lungs.
The gap between the vocal cords that communicate with the laryngopharynx is known as rima glottidis.
Thoracic cavity is an air-tight chamber which is enclosed by thoracic vertebrae along the dorsal side, ribs on its lateral surface, sternum at its ventral side and diaphragm at its bottom. The thoracic cavity contains the pair of lungs, heart, oesophagus, remnants of the thymus, etc.