The body requires oxygen, and the respiratory system takes in this vital substance and expells its byproduct—carbon dioxide. The system relies on various body parts and tissues to work. From the nose to the diaphragm, each part of the respiratory system is essential to keeping this system functioning optimally.

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<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="aj01e-0-0"><span data-offset-key="aj01e-0-0"><span data-text="true">Breathing. It's so easy you can do it in your sleep. Although respiration is a function we can do without conscious effort, it involves a lot of parts. One of the most important parts of the respiratory system is the lungs, of which you have two. They take up a lot of space in your chest. The ribcage protects the lungs. The muscle underneath them is the diaphragm. The diaphragm allows you to inhale and exhale air.</span></span></div>
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<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="4g6dc-0-0"><span data-offset-key="4g6dc-0-0"><span data-text="true">You inhale air through your mouth and nose. The air then travels down your </span></span><span class="adverb"><span data-offset-key="4g6dc-1-0"><span data-text="true">aptly</span></span></span><span data-offset-key="4g6dc-2-0"><span data-text="true"> named windpipe. The air gets filtered through tiny hairs before it fills your lungs. Red blood cells collect oxygen from the lungs and carry it to all the parts of the body. </span></span><span class="hardreadability"><span data-offset-key="4g6dc-3-0"><span data-text="true">These same cells collect carbon dioxide, a waste gas, and transports it back to the lungs for exhalation</span></span></span><span data-offset-key="4g6dc-4-0"><span data-text="true">. When your body is active, your muscles need more oxygen. This is why when you run you breath harder. Your body is regulating how much oxygen your muscles need or </span></span><span class="complexword"><span data-offset-key="4g6dc-5-0"><span data-text="true">anticipate</span></span></span><span data-offset-key="4g6dc-6-0"><span data-text="true"> needing.</span></span></div>
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Anatomy

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<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="1smsj-0-0"><span data-offset-key="1smsj-0-0">Anatomy is a branch of biology. This branch of science in particular deals with organisms and their biological structure. Human anatomy, along with physiology and biochemistry, forms the basis of medicine.</span></div>
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<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="8jihb-0-0"><span data-offset-key="8jihb-0-0">Some parts that make up the body's structure are </span><span class="adverb"><span data-offset-key="8jihb-1-0">incredibly</span></span><span data-offset-key="8jihb-2-0"> complex. Take the circulatory system, for example, which contains the heart and blood vessels. This system </span><span class="complexword"><span data-offset-key="8jihb-3-0">handles a lot of responsibility.</span></span><span data-offset-key="8jihb-4-0"> many crucial functions. It transports blood, nutrients, waste products, immune cells, and clotting cells. It is also </span><span class="adverb"><span data-offset-key="8jihb-5-0">closely</span></span><span data-offset-key="8jihb-6-0"> tied to the lymphatic system and our immune system. </span></div>
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<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="8jihb-0-0"><span data-offset-key="8jihb-6-0">As you can see, no one part of our anatomy functions completely separate from the others. </span>All the parts of the structure must get along in order for the body to function.</div>
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Respiratory System

What is the Respiratory System?

3. The Upper Respiratory System

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