Question

What is Human Lung?

Answer 1

In humans and many other mammals, including a few fish and snails, the lungs are the main organs of the respiratory system. Two lungs are located near the backbone on either side of the heart in mammals and most other vertebrates.

Complete answer:
- Humans have two lungs, one on the right and one on the left. They are found in the chest cavity's thoracic cavity. The right lung, which shares space in the chest with the heart, is larger than the left.
- In the respiratory system, they extract oxygen from the air and transfer it to the bloodstream, as well as releasing carbon dioxide from the bloodstream into the air, in a gas exchange process.
- The lungs are a part of the lower respiratory tract, which starts with the trachea and branches into the bronchi and bronchioles before receiving air through the conducting zone. The terminal bronchioles mark the end of the conducting zone.
- The lungs have a distinct blood supply, receiving deoxygenated blood from the heart in the pulmonary circulation for the purpose of receiving oxygen and releasing carbon dioxide, as well as a separate supply of oxygenated blood to the lungs' tissue in the bronchial circulation.
- A variety of respiratory diseases, such as pneumonia and lung cancer, can affect the tissue of the lungs. Chronic bronchitis and emphysema are examples of chronic obstructive pulmonary disease, which can be caused by smoking or exposure to toxic substances.
- The pulmonary pleura are the membranes that surround the lungs. The pleurae are two serous membranes that line the inner wall of the rib cage and the surface of the lungs. The outer parietal pleura lines the inner wall of the rib cage, while the inner visceral pleura directly lines the surface of the lungs. The potential space between the pleura is called the pleural cavity, and it contains a thin layer of lubricating pleural fluid.

Note:
- Every minute, a person breathes an average of 13 pints of air.
- Lungs float when submerged in water. The lungs are the only organs in the human body that can float on water.
- When it comes to breathing, oxygen plays a minor role. Our bodies only use 5 percent of the oxygen in the air we breathe; the rest is exhaled.