The respiratory system of the human body is responsible for the distribution of the air inhaled and exhaled throughout a person's life. The respiratory system includes the nose, throat, voice box, wind pipe, and lungs.
人体的呼吸系统负责人一生吸入和呼出空气的气体交换。呼吸系统包括鼻、喉咙、喉头、气管和肺。
Each time a person inhales, or breathes in air, several kinds of gases enter the body. The most important is oxygen because it keeps a person alive, and the cells of the body need it for energy and growth. The air enters through the nose and mouth and the lungs fill up and then empty out. When the air is inhaled there are tiny hairs in the nose called cilia that filter the air. The air is also warmed and moistened as it travels through the nose. Cilia also protects other parts of the respiratory passages, filtering out dust and other particles.
每次人体吸入空气,会有几种气体的进入人体。最重要的是氧气,因为它是人的生存需要氧气,并且人体细胞需要氧气用于制造能量和生长。空气通过鼻子和嘴进入,填满肺部,然后排空。当空气被吸入时,鼻子内的纤毛过滤空气。鼻腔同样也温润了吸入的空气。而且鼻毛还过滤掉了吸入的灰尘和其他颗粒。
The inhaled air travels through the windpipe, which is called the trachea. The human body contains two lungs. The lungs are pink, mushy, and like a sponge. The lungs are protected by the rib cage and keeps them protected and safe. The lung on the left side of the body is smaller than the right lung, which allows room for a person's heart. Beneath the lungs is a muscle called the diaphragm. It works with the lungs to allow a person to inhale and exhale. When a person breathes in the diaphragm shrinks and levels out as the lungs fill up with air.
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