Essay on The Respiratory System

1072 Words 5 Pages
When you think about it, it is truly a wonder how our body inhales oxygen and exhales carbon dioxide. This is possible because of the respiratory system. This system in the body is what allows us to breathe and continue our lives. An average human breathes fifty million times in their lifetime! The structure affects the function of this intricate and wonderful system that keep us alive. It all starts from the nose.
The basic parts of the respiratory system are the lungs, nose, trachea, diaphragm and alveoli. When we inhale, the diaphragm, which is located under the lungs relax which makes the lungs inflate by letting air come through from the outside. We take in air form our noses and our mouths. Little fine hairs in our noses called cilia, filters the air for foreign particles and also wets and warms the air. This is because cold, dry air can irritate the lungs. The warm air then travels down our throat and into the trachea. However, in the throat, there are two passages. One for food and the other for air. A small flap of flesh known as the epiglottis opens and closes to let air pass through but not food. Next, the air passes through the trachea into the lungs. The trachea is one of the most crucial part to the respiratory system. It is lined with 15 to 20 C-shaped cartilage rings so that it doesn’t collapse and block the air passageway. After the warm air passes through the trachea, it goes into the lungs. The lungs have two sides, the left lung and the right lung. The…