Circulatory & Respiratory Systems - CrashCourse Biology #27
Hank takes us on a trip around the body - we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxide from cells, and help make it possible for our bodies...
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All members of the kingdom Animalia need oxygen to make energy. Oxygen is compulsory. Without oxygen, we die. But as you know, the byproduct of the process that keeps us all alive, cellular respiration, is carbon dioxide, or CO2, and it doesn't do our bodies a bit of good, so not only do we need to take in the oxygen, we also have to get rid of the CO2. And that's why we have the respiratory and circulatory systems to bring in oxygen from the air with our lungs, circulate it to all of our cells with our heart and arteries, collect the CO2 that we don't need with our veins, and dispose of it with the lungs when we exhale. Now, when you think of the respiratory system, the first thing that you probably think of is the lungs. But some ani...
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All members of the kingdom Animalia need oxygen to make energy. Oxygen is compulsory. Without oxygen, we die. But as you know, the byproduct of the process that keeps us all alive, cellular respiration, is carbon dioxide, or CO2, and it doesn't do our bodies a bit of good, so not only do we need to take in the oxygen, we also have to get rid of the CO2. And that's why we have the respiratory and circulatory systems to bring in oxygen from the air with our lungs, circulate it to all of our cells with our heart and arteries, collect the CO2 that we don't need with our veins, and dispose of it with the lungs when we exhale. Now, when you think of the respiratory system, the first thing that you probably think of is the lungs. But some ani...
