Question

The covering of lungs in humans is
A. Peritoneum
B. Pericardium
C. Pleural membrane
D. Glisson Capsule

Answer 1

Hint: The lungs are made up of a branching network of bronchi, bronchioles and alveoli. The double membrane protecting the lungs reduces friction on the lung surface.

Complete Answer:
The lungs are found in the thoracic cavity, which is anatomically an air-tight area. The thoracic cavity consists of the vertebral column on the dorsal side, the sternum on the lateral side, the ribs, and the dome-shaped diaphragm on the bottom.

There are two membranes lining the lungs known as the pleurae. The pleurae are serous membranes that fold back to form a double membrane structure. The thin region between the two pleural layers is known as the pleural cavity that generally contains some amount of pleural fluid. The pleural fluid serves as a lubricant, enabling the parietal and visceral pleura to glide easily across each other.

The peritoneum is a closed cavity that includes all internal organs except the kidneys and the adrenal glands. The parietal peritoneum surrounds the wall of the abdomen and the diaphragm. The pelvic organs are protected by the visceral peritoneum.

The pericardium is a fibrous sac that covers the heart. It can be separated into three layers: fibrous pericardium, parietal pericardium, and visceral pericardium. Parietal and visceral pericardial form the serous pericardium.Glission capsules are a sheet of connective tissue that protects the liver and insulates the hepatic artery, portal vein, and bile ducts within the liver.

Thus, the correct answer is option C i.e., Pleural membrane.

Note: The right and left pleural cavities are entirely separate compartments. This is vital for avoiding the transmission of infection from one lung to another. It also ensures that the operation of one lung is not impaired by injury to the other lung.