Question

Lungs are enclosed in
A. Perichondrium
B. Periosteum
C. Pleural membrane
D. Pericardium

Answer 1

Hint: The lungs are a pair of air-filled, spongy organs on either side of the chest (thorax). Through its tubular branches, known as bronchi, the trachea (windpipe) transports inhaled air into the lungs. The bronchi divide further into smaller and smaller branches (bronchioles) until they are microscopic.

Complete answer:
In humans and other animals, such as most tetrapods, a few fish, and some snails, the lungs are the primary organs of the respiratory system. Two lungs are located near the backbone on either side of the heart in mammals and most other vertebrates.
In the respiratory system, they perform gas exchange by extracting oxygen from the atmosphere and transferring it to the bloodstream, as well as releasing carbon dioxide from the bloodstream into the atmosphere. Different muscular systems in different species drive respiration.
Pleural membranes, which are double-layered, surround the lungs. The heart is surrounded by pericardium. The periosteum covers the outer surface of bones and the perichondrium surrounds cartilage.
The pericardium is a fibrous sac that surrounds and protects the heart and major blood vessels. It stabilizes the heart in the mediastinum, allows it to move freely, and separates it from the lungs and other mediastinal structures. It also aids in the physiological function of the heart.

Thus, the answer is Option C: pleural membrane

Note:
The fibrous pericardium, which is made up of dense and loose connective tissue, is the outer layer of the pericardium. While it can change shape slightly, it is largely rigid, which protects the heart from blunt forces and sudden pressure changes from the outside. It is connected to the posterior adventitial layer of neighboring great blood vessels and is continuous with the outer adventitial layer of neighboring great blood vessels.