Lesson
Respiratory System
7th grade
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  • Slide 1
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    Respiratory System

    Grade7

  • Question 2
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    Q.

    What is the difference between RESPIRATION and BREATHING.

  • Slide 3
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    RESPIRATION vs BREATHING

    • Breathing is a biophysical process that involves the exchange of gases through inhalation and exhalation

    • Respiration is a biochemical process to release energy from organic compounds which are then used for performing different physical activities.

  • Slide 4
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  • Slide 5
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    Structure of the human respiratory system

    • Pharynx- is part of the conducting zone for air into the lungs.Main function is to warm and humidify air before it reaches the lungs.


    • Larynx- to protect the airway from choking on material in the throat. To regulate the flow of air into our lungs The production of sounds used for speech.

  • Slide 6
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    Structure of the human respiratory system

    • Trachea- also called the windpipe, cartilaginous tube that connects the larynx  to the bronchi of the lungs

    • Bronchi- the airways that lead from the trachea into the lungs

  • Slide 7
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    Structure of the human respiratory system

    • Alveoli- where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. also called as air sac.

    • Diaphragm- located below the lungs, is the major muscle of respiration.

  • Question 8
    30 seconds
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    Q.

    the airways that lead from the trachea into the lungs

    answer choices

    Trachea

    Bronchi

    Larynx

    Pharynx

  • Question 9
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    Q.

    It is also called as air sac.

    answer choices

    Alveoli

    Bronchi

    Larynx

    Pharynx

  • Question 10
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    Q.

    It is also called as the voicebox

    answer choices

    Larynx

    Pharynx

    Bronchi

    Alveoli

  • Question 11
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    Q.

    It is also called as your windpipe.

    answer choices

    Larynx

    Lung

    trachea

    Bronchi

  • Slide 12
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    Definition of terms:

    • Respiration: a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.

    • Gas exchange: It  is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs.

    • Diffusion: the process of a substance spreading out to evenly fill its container or environment.

  • Slide 13
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  • Question 14
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    Q.

    It is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs.

    answer choices

    Gas Exchange

    Diffusion

  • Question 15
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    Q.

    the process of a substance spreading out to evenly fill its container or environment.

    answer choices

    Gas exchange

    Diffusion

  • Slide 16
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    We now know that…


    • Respiratory system includes trachea, bronchi, lungs, diaphragm, and the muscles between the ribs.

    • Gas exchange is the diffusion of gases into and out of the body

    • Oxygen diffuses from the air sacs into the blood. Carbon dioxide diffuses the other way. 

    • Thin walls of air sacs help gas exchange to take place quickly.

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