Our Lungs

 

This week we are looking at our lungs.

The human lungs are a pair of soft, spongy organs located inside the chest, protected by the rib cage. They are an essential part of the respiratory system, which allows the body to take in oxygen and remove carbon dioxide. Every breath brings fresh air into the lungs, where oxygen moves into the bloodstream and is carried to cells throughout the body.

The rib cage plays an important role in protecting the lungs. The ribs form a strong, curved frame around the chest that helps shield the lungs and heart from injury. The rib cage also helps with breathing because the ribs move up and out when a person breathes in, allowing the lungs to expand, and move down and in when a person breathes out.

Air enters through the nose or mouth, travels down the trachea, and then passes into two main bronchi, one leading to each lung. These bronchi branch into smaller tubes called bronchioles, which end in tiny air sacs called alveoli. The alveoli are surrounded by small blood vessels, making them the main site where oxygen and carbon dioxide are exchanged.

A person’s lung capacity or the amount of air the lungs can hold varies from person to person depending on age, body size, fitness level, and overall health. People who exercise regularly often use their lungs more efficiently, while smoking, illness, or pollution can reduce how well the lungs work. Measuring lung capacity can help doctors understand how healthy a person’s breathing system is.

The right lung has three lobes, while the left lung has two lobes to make room for the heart.

The diaphragm, a large muscle below the lungs, helps pull air in and push air out during breathing.

Healthy lungs help supply oxygen for energy, remove waste gases, and support the body’s overall function.