why do we need our respiratory system

What do you need to do to each and every day here on Earth? If you're like most kids, eating and drinking are the two things that probably come to mind first. However, there's one other important thing you need to do
to. What are we talking about? Breathing, of course! We do it so often Б and without thinking Б that it's easy to forget about. We can go days without water and possibly weeks without. We can't go minutes without, though! But why is that? What does breathing serve? The importance of breathing is linked directly to the importance of one particular element your body needs : oxygen. When you inhale, a large muscle called the flexes downward to help air into your lungs. Your lungs are one of the largest organs in your body. They work together with the rest of your system to keep your body's cells supplied with necessary oxygen. If you put your hand on your chest, you can feel it expand and contract as you inhale and exhale. That's the power of your lungs working together with your to bring air into and out of your body. As you breathe in air, it travels through large tubes in your lungs called bronchi. The bronchi branch off into many smaller tubes called bronchioles. You have about 30,000 bronchioles in each lung.

At the end of each bronchiole are clumps of extremely air sacs called. How small are? Very small! So small, in fact, that there are about 600 million of them in your lungs! The in your lungs are covered with called. It's there, in your, that the oxygen in the air you breathe passes into your blood the. From your, the blood travels to the heart, where it's pumped out to the rest of the cells in your body. Your cells need oxygen to convert the nutrients you eat into energy for your body. In the process of making that energy, some waste products are produced. One of the main waste products is a called carbon dioxide. Your body needs to get rid of carbon dioxide, so what does it do? It breathes it out! That's right! Not only does breathing provide your body with necessary oxygen, but it also rids the body of waste like carbon dioxide. To get rid of carbon dioxide, your delivers it to the your. In the, the carbon dioxide moves into the lungs, where it leaves the body when you exhale. Exhaling occurs when your flexes upward to push air out of your lungs and back into the air. You usually don't even notice it, but twelve to twenty times per minute, day after day, you breathe -- thanks to your body's.

Your expand and contract, supplying life-sustaining oxygen to your body and removing from it, a waste product called. Breathing starts at the nose and. You inhale air into your nose or, and it travels down the back of your throat and into your windpipe, or. Your trachea then divides into air passages called bronchial tubes. For your to perform their best, these airways need to be open during inhalation and exhalation and free from or swelling and excess or abnormal amounts of mucus. As the bronchial tubes pass through the lungs, they divide into smaller air passages called bronchioles. The bronchioles end in tiny balloon-like air sacs called alveoli. Your body has over 300 million alveoli. The alveoli are surrounded by a mesh of tiny vessels called capillaries. Here, oxygen from the inhaled air passes through the alveoli walls and into the. After absorbing oxygen, the blood leaves the lungs and is carried to your. Your then pumps it through your body to provide oxygen to the cells of your tissues and organs. As the cells use the oxygen, carbon dioxide is produced and absorbed into the blood. Your blood then carries the carbon dioxide back to your lungs, where it is removed from the body when you exhale.

Inhalation and exhalation are the processes by which the body brings in oxygen and expels carbon dioxide. The breathing process is aided by a large dome-shaped muscle under the lungs called the diaphragm. When you breathe in, the diaphragm contracts downward, creating a vacuum that causes a rush of fresh air into the lungs. The opposite occurs with exhalation, where the diaphragm relaxes upwards, pushing on the lungs, allowing them to deflate. The respiratory system has built-in methods to prevent harmful substances in the air from entering the lungs. Hairs in your nose help filter out large particles. Microscopic hairs, called cilia, are found along your air passages and move in a sweeping motion to keep the air passages clean. But if harmful substances, such as cigarette smoke, are inhaled, the cilia stop functioning properly, causing health problems like. Mucus produced by cells in the trachea and bronchial tubes keeps air passages moist and aids in stopping dust, bacteria and viruses, -causing substances, and other substances from entering the lungs. Impurities that do reach the deeper parts of the lungs can often be moved up via mucous and coughed out or swallowed. В 2017 WebMD, LLC. All rights reserved.

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