"The processing of air by the respiratory tract" Human Respiration PPT Courseware 4

"The processing of air by the respiratory tract" Human Respiration PPT Courseware 4

Knowledge goal

1. Describe the components of the human respiratory system;

2. Understand the role of the respiratory tract and recognize that the respiratory tract has a limited capacity to process air;

3. Understand the functions of the nose, pharynx, and larynx.

Capability goals

Through data analysis, develop analytical skills and comprehensive induction skills.

Emotional attitudes and values

1. Develop analytical attitudes, methods and thinking qualities, realize the importance of air quality to human health, and improve environmental awareness;

2. Pay attention to the health of your own respiratory system, develop good living habits, and cultivate a scientific attitude and scientific spirit;

3. Initial development of independent learning habits for analyzing data.

1. Composition of the respiratory system

The respiratory system has a structure and function suitable for gas exchange with the outside world.

2. The role of respiratory tract

Analyze the following textual information:

1. The respiratory tract has bone or cartilage as a scaffold.

2. The temperature inside the human body is generally constant at around 37.5°C, but the temperature of the external environment varies. The relative constantness of body temperature is very important for life activities.

3. There are nasal hairs in the front of the nasal cavity; the mucous membrane on the inner surface of the nasal cavity can secrete mucus, and there are abundant capillaries distributed in the mucosa.

think about it

What structure does the respiratory tract have to ensure smooth airflow?

The respiratory tract has bone or cartilage as a scaffold. This can make the air in the respiratory tract unobstructed. In addition, the nasal hairs in front of the nasal cavity and the mucus on the surface of the nasal cavity also play a certain role in ensuring the unobstructed air.

In addition to ensuring smooth airflow, what other functions does the respiratory tract have? How are these effects achieved?

(1) Warm air: The nasal cavity preheats the inhaled cold air.

(2) Clean air: Nose hairs and mucus in the nasal cavity block and stick to, and kill inhaled dust and bacteria.

(3) Humidified air: The mucus in the nasal cavity moistens the inhaled air.

role of respiratory tract

(1) It is the passage for gas to enter and leave the lungs.

(2) Process the inhaled gas to make the gas reaching the lungs warm, moist and clean.

But the air-processing capacity of the respiratory tract is limited.

(3) It has the function of making sounds.

Class summary

(1) The respiratory system includes the respiratory tract and lungs. The respiratory tract is the passage for gas, including the nose, pharynx, larynx, trachea, and bronchi. The lungs are the site of gas exchange.

(2) The respiratory tract is not only a passage for gas, but also makes the gas warm, moist and clean.

Classroom exercises

1. When breathing, the correct way for outside air to enter the lungs is: ___, ___, ____, _____, _____, lungs.

2. The lungs are the site of __________, and their main function is to change the inhaled air into _____, _____, _____ to reduce irritation to the lungs.

3. The common channel for food and gas is ( )

A. Oral cavity B. Pharynx C． Throat D. esophagus

4． Which of the following is both an organ that makes up the respiratory tract and a vocal organ? ()

A. Nose B. Pharynx C． LungsD. throat

5. The winter in Northern Europe is very cold. Nordic people have larger noses. The function is ( )

A. Make people beautiful b. make nostrils larger

C. Make the nasal cavity longer D. make nose hair longer

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For more information about the PPT courseware "The Human Body's Respiratory Respiratory Processing of Air", please click the Human Body's Respiratory ppt Respiratory Respiratory Processing of Air ppt tag.

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