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Human Respiratory System

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(a) Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms ? Explain. (b) Draw a diagram of human respiratory system and label - pharynx, trachea, lungs, diaphragm and alveolar sac on it.

Knowledge Check

  • Which of these statements are fasle regarding the human respiratory regarding the human respiratory system ? (a) The nasal chamber opens into the pharynx . (b) Trachea, bronchus and initial bronchioles are supproted by complete cartilaginous rings. (c ) The branching network of bronchi, bronchioles and alveoli comprises the lungs. (d) Pleural fluid increase friction on the lung surface.

    A
    a & b
    B
    b & c
    C
    b & d
    D
    only d

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    S to Z are structures of the human respiratory system. Arrange them to show the order in which air from outside travels through the respiratory system to reach the gaseous exchange surface in the lungs. S: Bronchioles U: Nostrils W: Epiglottis Y: Trachea T: Bronchi V: Pharynx X: Larynx Z: Alveoli

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