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NAT6 U3 The respiratory system and breathing (p  ...

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    The respiratory system and breathing
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  • What system are the pharynx, larynx and trachea are part of?
    The respiratory system
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  • What are bronchioles?
    smaller branches of the bronchi
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  • What are microscopic sacs surrounded by capillaries that have blood constantly flowing through them?
    Alveoli
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  • What happens to the diaphragm during inhalation?
    it contracts and the lungs expand
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  • What happens to the diaphragm during exhalation?
    it relaxes and the lungs contract
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  • Where does air enter through the body?
    through the nasal cavity or mouth
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  • Oxygen in the inhaled air passes into the _________ that surround the alveoli.
    capillaries
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  • What are capillaries?
    very thin blood vessels that run to the organs to exchange substances between the blood and the cells
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  • What do veins carry from the organs to the heart?
    blood
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  • Arteries carry the blood from the heart to the ______.
    organs
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  • Oxygen, ______, and waste travel in the blood from one part to the another.
    nutrients
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  • What are the two circuits in the circulatory system?
    pulmonary circuit and the systemic circuit
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  • In the pulmonary circuit, where does the blood travel?
    between the heart and the lungs
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  • In the systemic circuit, where does the blood travel?
    between the heart and the other organs
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  • What system are the heart, capillaries, veins, and arteries a part of?
    the circulatory system
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