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why do we need air to survive

The earth is surrounded by air, a mixture of extremely important gases such as oxygen, carbon dioxide and nitrogen. These gases provide animals with oxygen for respiration to occur. It also provides green plants with carbon dioxide for photosynthesis to happen. It is vital that living things respire to get the oxygen for living cells to function. Without air, there is no life. Plants use Carbon Dioxide (together with sunlight and water) to produce energy and give out Oxygen as a by-product. This oxygen is what almost all animals need to survive. They absorb Carbon Dioxide from the air and discharge Oxygen through very tiny pores in the leaves. Air is also important for living organisms in the soil to survive and function. Without soil aeration, decomposers cannot work on organic matter to decompose them, as soil moisture alone is not enough for decomposition. Moving air (wind) is also important for some plants to pollinate.

Animals including humans need oxygen to live. We breathe in oxygen and breathe out Carbon Dioxide. There are also air pockets in soils and water that help tiny living things survive in water and beneath the soils. For example, fishes absorb Oxygen from water with their gills. All animals are adapted with special organs and parts that help them absorb the oxygen they need from the air.
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.

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