Articles about "Respiratory System"
Table of Contents
The respiratory system is the part of the body that helps us breathe. It lets air in and out, allowing oxygen to enter the body and carbon dioxide to leave. This system includes the nose, throat, windpipe, and lungs.
How It Works
When we breathe in, air travels through the nose or mouth, down the windpipe, and into the lungs. In the lungs, oxygen from the air moves into the blood, and carbon dioxide, a waste product, moves from the blood into the air to be exhaled. The lungs are made up of tiny air sacs called alveoli, where this exchange happens.
Protecting the Lungs
The lungs are lined with mucus and tiny hair-like structures called cilia. Mucus traps dust, germs, and other particles, keeping them from reaching the lungs. Cilia help move the mucus out of the lungs and up to the throat, where we can cough or swallow it. This helps protect the lungs from harmful substances.
The Role of Epithelial Cells
Epithelial cells line the airways and help maintain the health of the lungs. They respond to different stressors, like pollution or smoke, by activating protective mechanisms. If these cells are not working well, it can lead to breathing problems and diseases like asthma.
Importance of the Respiratory System
The respiratory system is essential for getting the oxygen our body needs to function. It also plays a role in keeping the lungs healthy and protected from infections. Understanding how this system works helps us appreciate its importance in our overall health.