THe Respiratory System

Topics: Respiratory system, Vertebrate trachea, Nasal cavity Pages: 3 (939 words) Published: February 23, 2014
The Respiratory System

The human respiratory system plays a very important part in our bodies. Without it, we wouldn’t be alive! We need air to move through our bodies at all times. Breathing, is a key necessity for life. Our respiratory system is made up of many organs that all work together. The goal of breathing is to deliver oxygen to the body and take away carbon dioxide. The respiratory system organs all work together, like a engine in a car, they all have a important role. Some of the organs are the lungs, the nose, the larynx, trachea, bronchi, and diaphragm.

The lungs are the main organs in the respiratory system. Oxygen is taken in through the lungs, either through your mouth or nose. When you exhale, carbon dioxide is released. The red blood cells play are very important part with the oxygen that is taken in when you breathe. The red blood cells carry the oxygen to all the other body cells that need oxygen. The red blood cells then pick up the carbon dioxide, which is a waste gas produced by our cells. The lungs are are conical organs that are present inside the pleural cavity. The left lung is divided into two lobes, superior and inferior. While the right lung is divided into three lobes, superior, inferior and middle. Each lung has a triangular organ called hilum. The hilum has blood vessels, nerves, lymphatics and bronchi that all pass through it. Our right lung is slightly larger than our left lung. We breathe in about 8,000 to 9,000 liters of air in one day. Our lungs expand and contract about 25,000 times a day. A average adult can breathe about 14 to 16 times per minute. This rate increase with exercise, a average is about 60 times per minute. Our nose hairs play a important role in the respiratory system too. They help keep the air clean that we breathe in. The hairs act as filters and they purify the air which is entering into the respiratory tract. The nose leads to a large cavity within our

skull. This cavity and the space...
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