Pinyin/Respiratory System

The respiratory system, also called the gas exchange system, is the body getting rid of carbon dioxide and taking in oxygen. Carbon dioxide, a waste product, goes out of the body. Oxygen, which the body needs, comes in.

Hūxī xìtǒng, yě chēngwéi qìtǐ jiāohuàn xìtǒng, shì réntǐ xīrù yǎngqì, hūchū èryǎnghuàtàn de xìtǒng. Shēntǐ xīrù suǒxū de yǎngqì, hūchū fèipǐn èryǎnghuàtàn.

The first step in this process is breathing in air, or inhaling. The second step is gas exchange in the lungs where oxygen from the air is diffused into the blood and the carbon dioxide diffuses out of the blood. The third process is cellular respiration, which produces chemical energy (ATP), and carbon dioxide. Finally, the carbon dioxide from cellular respiration is breathed out of body from the lungs.

Guòchéng de dìyībù shì xīrù kōngqì. Dì'èrbù shì fèibù de qìtǐ jiāohuàn, kōngqì de yǎngqì kuòsàn dào xuèyè, yǐjí èryǎnghuàtàn kuòsàn chū xuèyè. Dìsānbù shì xìbāo hūxī, chǎnshēng huàxué néngliàng (ATP) hé èryǎnghuàtàn. Zuìhòu, xìbāo hūxī chǎnshēng de èryǎnghuàtàn tōngguò fèibù hūchū tǐwài.