why do we need air to live
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. Just like us and other living creatures on the earth, plants also need air to survive. While we, the human beings, need air only to breathe in, the plants need it for making their food as well. During the day and night time, plants inhale oxygen for survival. They absorb oxygen through pores found on undersides of the leaves. The oxygen spreads into the live cells of plants and makes them breathe. Carbon dioxide also seeps out through these pores. Along with 24/7 В requirement of oxygen, plants also need carbon dioxide during the day for making their food.
In the presence of sunlight, the chlorophyll in leaves makes food with the help of water in the soil and carbon dioxide in the air. This process is known as photosynthesis. For photosynthesis, plants also inhale carbon dioxide through the same pores. So, plants need air for two reasons в respiration and photosynthesis. In fact, plants are the natureвs greatest recycling agents. While all living creatures, animals and plants exhale carbon dioxide as a waste product of respiration, plants take up it during day time for making their food. During this process of making food or photosynthesis, plants convert carbon dioxide and water into oxygen. Besides, plants do not need as much oxygen as animals or human beings, because they are stationery and they have different metabolic needs. This way, the earth never runs out of oxygen because plants continuously keep converting carbon dioxide into oxygen and keep seeping carbon dioxide for photosynthesis.
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