Question

Lungs in the thoracic cavity is seperated form the abdominal cavity by means of

• A. Peritonium
• B. Pleura
• C. Trechea
• D. Diaphragum

Answer 1

The correct option is D Diaphragum

The thoracic diaphragm, or simply the diaphragm, is a sheet of internal skeletal muscle that extends across the bottom of the thoracic cavity. 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 forced into the lungs. The peritoneum is the serous membrane that forms the lining of the abdominal cavity or coelom in amniotes and some invertebrates. Pleura is each of a pair of serous membranes lining the thorax and enveloping the lungs in humans and other mammals. The trachea, colloquially called windpipe, is a tube that connects the pharynx and larynx to the lungs, allowing the passage of air.

Therefore, the correct answer is option D.