Our respiratory system is made up of the organs in our body that help us to breathe. Remember: Respiration = Breathing. The goal of breathing is to deliver oxygen to the body and to take away carbon dioxide. Parts of the respiratory system: Lungs The lungs are the main organs of the respiratory system. In the lungs oxygen is taken into the body and carbon dioxide is breathed out. The red blood cells are responsible for picking up the oxygen in the lungs and carrying the oxygen to all the body cells that need it. The red blood cells drop off the oxygen to the body cells, then pick up the carbon dioxide which is a waste gas product produced by our cells. The red blood cells transport the carbon dioxide back to the lungs and we breathe it out when we exhale. Trachea The trachea is sometimes called the windpipe. The trachea filters the air we breathe and branches into the bronchi. Bronchi The bronchi are two air tubes that branch off of the trachea and carry air directly into the lungs. Diaphragm Breathing starts with a dome-shaped muscle at the bottom of the lungs called the diaphragm. When you breathe in, the diaphragm contracts. When it contracts it flattens out and pulls downward. This movement enlarges the space that the lungs are in. This larger space pulls air into the lungs. When you breathe out, the diaphragm expands reducing the amount of space for the lungs and forcing air out. The diaphragm is the main muscle used in breathing. Why do we yawn? When you are sleepy or drowsy the lungs do not take enough oxygen from the air. This causes a shortage of oxygen in our bodies. The brain senses this shortage of oxygen and sends a message that causes you to take a deep long breath – a yawn. Why do we sneeze? Sneezing is like a cough in the upper breathing passages. It is the body's way of removing an irritant from the sensitive mucous membranes of the nose. Many things can irritate the mucous membranes. Dust, pollen, pepper or even a cold blast of air are just some of the many things that may cause you to sneeze. What causes hiccups? Hiccups are the sudden movements of the diaphragm. It is involuntary – you have no control over hiccups, as you well know. There are many causes of hiccups. The diaphragm may get irritated, you may have eaten too fast, or maybe some substance in the blood could even have brought on the hiccups. Задание 1. Найдите английские эквиваленты данных слов и словосочетаний в тексте. верхние дыхательные пути, раздражитель, причины, слизистые оболочки, вызывать, красные кровяные тельца, кашель, непроизвольный, движение, воздух, диафрагма сокращается, куполовидная мышца, передают воздух напрямую в лёгкие; может быть, вы ели слишком быстро; целью дыхания является доставить кислород в организм. Задание 2. Составьте предложения, используя данные слова. a) this, that, in, movement, are, lungs, the, enlarges, space, the b) lungs, are, oxygen, sleepy, or, not, the, do, enough, drowsy, air, the, you, take, from, when c) or, even, many, you, dust, some, a, cold, things, pepper, cause, to, blast, of, sneeze, air, are, just, of, pollen, the, that, may