"The processing of air by the respiratory tract" Human Respiration PPT Courseware 2

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"The processing of air by the respiratory tract" Human Respiration PPT Courseware 2

do you know?

Babies come into this world crying

(Go home and ask your mother if you are crying? If you don’t cry, you will be beaten until you cry. Do you know why?)

think about it

What structures in the human body are related to respiration?

role of respiratory tract

①. What structure does the respiratory tract have to ensure smooth airflow?

②. In addition to ensuring smooth airflow, what other functions does the respiratory tract have? How are these effects achieved?

③. With the respiratory tract processing the air, can the human body completely avoid the harm of harmful substances in the air?

The respiratory tract has a limited capacity to process air, so it is very important to keep the air in the environment fresh and clean.

1. The respiratory tract is supported by bone and cartilage.

This structure can ensure the smooth flow of gas in the respiratory tract.

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 part of the nasal cavity; the mucosa on the inner surface of the nasal cavity can secrete mucus, and there are abundant capillaries distributed in the mucosa.

pharynx

The pharynx is a funnel-shaped tube that is slightly flattened front and back and is composed of mucosa and pharyngeal muscles. It is the common passage between the respiratory and digestive systems.

The pharynx has the functions of swallowing and breathing;

In addition, the pharynx is also an important pronunciation resonance organ, which plays an auxiliary role in pronunciation;

The pharynx is rich in lymphoid tissue, and the pharyngeal lymphatic ring is composed of tonsils, etc., which can prevent bacterial invasion of the pharynx. This function is more obvious in childhood.

The larynx is connected to the pharynx above and the trachea below. It is both a respiratory passage and a vocal organ.

The scaffold of the larynx is mainly composed of epiglottic cartilage, thyroid cartilage and cricoid cartilage;

There is a vocal cord on the left and right sides of the laryngeal cavity, and the gap between the two vocal cords is the glottis cleft. When breathing or speaking, the epiglottis opens and air can flow in and out freely. When swallowing, the epiglottis automatically closes to prevent food from entering the trachea.

Class exercises

1. Before giving artificial respiration to a drowning person, why should we first remove the dirt from his mouth and nose?

2. When you have a severe cold, you often have to breathe through your mouth. In this case, your throat will feel very dry when you wake up in the morning. What does this mean? Why is breathing through the nose better than breathing through the mouth?

3. How are acute bronchitis and pneumonia caused by bacteria and fungi spread? How do these pathogenic microorganisms reach the site of disease?

4. If patients with acute bronchitis are not treated in time, they are prone to pneumonia. Why?

1. The components of the human respiratory system should be arranged in order ( )

A. Nasopharynx Larynx Bronchus Trachea Lungs

B． nose throat pharynx trachea bronchi lungs

C. Nose, mouth, pharynx, trachea, bronchi

D. Nasopharynx Larynx Trachea Bronchi Lungs

2. When eating while talking and laughing, food can easily enter the trachea. The reason is ( )

A. Airflow impact, glottis cracked widely

B. Airflow impact, laryngeal cavity expansion

C. The epiglottis cartilage fails to cover the entrance to the larynx

D. Enlargement of tracheal cartilage

3. Each of the following examples attempts to discuss the advantages of breathing through the nose, but one item is incorrect. It should be ( )

A. Olfactory cells in the nasal mucosa can sense odor stimulation

B． The nasal mucosa is rich in capillaries and can warm the cold air inhaled

C. Nose hairs can block dust in the air that people inhale.

D. The nasal mucosa secretes mucus to clean and moisten the inhaled air

4． The site where phlegm is produced is ( )

A. Nasal mucosa B.Laryngeal side wall

C. Tracheal and bronchial mucosa D. Esophageal mucosa

Standard expansion:

①The components of the human respiratory system should be arranged in order:

A. Nasopharynx Larynx Bronchus Trachea Lungs

B． nose throat pharynx trachea bronchi lungs

C. Nose Mouth Pharynx Larynx Trachea Bronchi

D. Nasopharynx Larynx Trachea Bronchi Lungs

② Each of the following examples attempts to discuss the advantages of breathing through the nose, but one item is incorrect. It should be:

A. Olfactory cells in the nasal mucosa can sense odor stimulation

B． The nasal mucosa is rich in capillaries and can warm the cold air inhaled

C. Nose hairs can block dust in the air you breathe in

D. The nasal mucosa secretes mucus to clean and moisten the inhaled air

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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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Update Time: 2024-07-23

This template belongs to biology courseware People's Education Press seventh grade biology book volume 2 industry PPT template

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