The earth we live on is suffering from serious air pollution. With the development of the world's industrial economy and the dramatic increase in population, human desires are rising infinitely and pr

The earth we live on is suffering from serious air pollution. With the development of the world's industrial economy and the dramatic increase in population, human desires are rising infinitely and production

(1) The human respiratory system consists of two parts: the respiratory tract and the lungs. The respiratory tract includes the nasal cavity, pharynx, larynx, trachea, and bronchi. It is the passage for breathing. The respiratory tract ensures the cleanliness, warmth, moisture, and smooth flow of gases. The lungs are the main organs of the respiratory system and are the place for gas exchange.

(2) There are glandular cells and cilia on the surface mucosa of the trachea and bronchi. The glandular cells secrete mucus to moisten the trachea. The mucus contains substances that can resist bacteria and viruses. The swinging of cilia can transport foreign dust, bacteria, etc. together with mucus to the pharynx, and then be expelled from the body through coughing to form phlegm. Therefore, spitting may spread viruses, bacteria and other microorganisms into the air, thus endangering human health.

(3) Low-carbon life should start from now, start from yourself, start from small things, mainly in three aspects: energy saving, gas saving and recycling, such as saving electricity (turning off the electricity easily) Lights, turn on less air conditioning, blow less fans, watch less TV, turn off the computer in time...), ride a bicycle or walk to school, take the bus, vigorously develop nuclear energy, build nuclear power plants, advise parents to build biogas pools and use solar water heaters, etc.

So the answer is: (1) The nasal cavity, pharynx, larynx, trachea, and bronchi are the passages for breathing and the passage of air into the human body; the lungs are the main organs of the respiratory system;

(2) There are glandular cells and cilia on the surface mucosa of the trachea and bronchi. The glandular cells secrete mucus to moisten the trachea. The mucus contains substances that can resist bacteria and viruses. The swinging of cilia can transport foreign dust, bacteria, etc. together with mucus to the pharynx, and then be expelled from the body through coughing to form phlegm. Therefore, spitting may spread viruses, bacteria and other microorganisms into the air, thereby endangering human health;

(3) Save electricity (turn off lights, turn on the air conditioner less, blow less fans, watch less TV, turn off the computer in time...), ride a bicycle or walk to school, take the bus, vigorously develop nuclear energy, build nuclear power plants, advise parents to build biogas digesters and use solar water heaters, etc.