Everyone can breathe in the water, but only at a specific time. Why not at any time?

People often fantasize that if humans could breathe in liquid, there would not be so many people who would not be drowned by swimming. If so, divers will be much more relaxed and will no longer need to carry heavy oxygen tanks underwater.


Others say that foreign genius inventors have also invented artificial gills to help people breathe in the water. This means that we humans can’t breathe in liquid alone. In fact, at the beginning of our lives, we developed this ability in our mother’s stomach.

People’s breathing mode is through the exchange of oxygen with alveoli and capillaries, which is integrated with oxygen and emits carbon dioxide. But maybe a lot of people forget that when we were still in the fetus, we were surrounded by liquid, and our whole body was soaked with amniotic fluid, only connected with an umbilical cord. So, is this breathing in liquid?


In fact, in the fetal period, the lung is solid and can not breathe, so the fetus will not drown in amniotic fluid. The fetus’s breathing is completed by the blood getting oxygen from the placenta, so it is not the lung, but the umbilical cord. Let’s put it this way, humans were once thought to breathe in “liquid.”. Can adults breathe with liquid? This seemingly stupid question, scientists have studied!


Can adults breathe in liquid?

If a normal adult wants to breathe, he must have two conditions: first, oxygen can enter the lung, and second, carbon dioxide can be discharged from the lung. These two conditions must be met at the same time. It is not impossible for people to breathe with liquid. Researchers have done an experiment with mice: the mice were immersed in a high concentration of sodium chloride solution, and the mice died.


Although there is a lot of dissolved oxygen, the lungs of mice can not emit a lot of carbon dioxide, and the physiological function of the lungs is immediately damaged. A year later, the scientists replaced the liquid compound formed only by carbon and fluorine with a high concentration of sodium chloride aqueous solution, which can dissolve carbon dioxide and oxygen in large amounts of water.


Therefore, the carbon dioxide emitted by the mice is dissolved in this liquid, because oxygen can be dissolved in the solution, so it is no problem for the mice to inhale oxygen in the liquid, and the mice can breathe in the liquid! With the further development of science, we have synthesized more compounds that can make mice breathe in liquid perfluorodiodane. This organic viscous liquid is denser than water, and is also used in medicine to help patients with acute dyspnea, as an auxiliary means of lung respiratory function, and to improve the gas exchange capacity between oxygen and lung.

But if people want to breathe in this liquid, there will be a lot of trouble. Although it is non-toxic and harmless, if the human body is completely injected into the liquid, it can not meet the amount of oxygen that the human body needs to absorb and emit carbon dioxide. Even with the help of science and technology, it can only keep breathing in the liquid for about 5 minutes. Although the current technology can not be realized, I believe chemists can synthesize more perfect compounds in the near future, and medicine can also help people with dyspnea and benefit mankind!

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