It and it makes sense that it has cartilage. The trachea is actually a reasonably rigid structure. Trachea, which is essentially just the pipe for air. Through the larynx- this is on the way in- it goes to the Of this whole anatomical structure that looks something So that's also your voicebox,īut I won't focus on that right now. To shape the sound with my mouth to make this video. That are vibrating at just the right frequencies and I'm able Now, there are these little things right about here What do we do with our air? So I'm going to focus as the air I'm going to use yellow toĬontinue and I'm going to use green for the air. In the back you have yourĮsophagus and in the front- let me draw a little dividing In the back you have yourĮsophagus- and we'll talk more about the esophagus Go down either one, but the other one is for food. Through your pharynx and then the pharynx splits Your nasal cavity or your oral cavity and then comes back It gets warmed up and and what not, but you can breathe Probably because it gets filtered by your nose hairs and Nose- they say breathing through your nose is better, Where they connect is called the pharynx. The back of our nose or the back of our mouth. Nostrils and they open up into a nasal cavity. Oral cavity right there, which is just the space that Something like this and he's got- this is his shoulders. Show us how we take air in and how we take airįirst. All of that is irrelevant,īut this is our guy. Or the person I'm going to use to diagram. His eyes aren't important,īut just so you know it's a person. Let me draw someone withĪ nose and a mouth. How do we get the carbon dioxide out? And I think any of us could at Get our oxygen into our body and how we release itīack out into the atmosphere. So in this video, what I want toĭo is take a big step back and think about how we actually Respiration, we break down those sugars and we releaseĬarbon dioxide. Or anything that we have to do move, or breathe, or think, That can then drive other types of cellular functions. Metabolize our food, in order to turn our food into ATPs Respiration, you know that we need the oxygen in order to Videos, you had a sense that we need oxygen and that I hope this answer helps.Īlready on respiration. Sorry that took a while to explain, but I wanted to cover all the necessary information. There are many alveoli to maximize the amount of blood oxygenation with each breath, and thus maximize the efficiency of the process. However, the more it is broken up into smaller parts, the more the surface area increases, and the more blood can be oxygenated at once. If it was one large alveolus, then the only surface area available for blood oxygenation is the surface area that it provides. So to answer your initial question, the reason the human body does not have one alveolus is due to this idea of surface area. When you divide a three-dimensional object into smaller components, the total surface area increases. Then, cut it in half and measure the surface areas of both new objects and add them together. How does this work? Take a cube and measure its surface area. The reason there are so many of them is because this maximizes the surface area. So for the alveoli, their surface area is the maximum amount of space through which this exchange can occur, because that's the maximum amount of space these capillaries can occupy. In math, a three-dimensional object has a specific surface area. However, they have to be right up against the alveoli for this exchange to occur. These capillaries cover the outside of the alveoli and exchange the carbon dioxide molecules they have for the oxygen molecules from the lungs. The way this happens is through diffusion through the walls of extremely thin blood vessels called capillaries. However, the oxygen must first get to the blood. The reason for this is that the lungs exist to oxygenate the blood so the blood can then transport the oxygen to the rest of the body. While this does initially seem logical, this is inefficient to the point of being fatal.
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