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    Breathing

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    mariamattia24688

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    Breathing

    Uploaded by

    mariamattia24688
    2 views1 page

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    Copyright:

    © All Rights Reserved
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    2 views1 page

    Breathing

    Uploaded by

    mariamattia24688

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 1

    Respiration and breathing are not the same!

    Year 8 Knowledge Organiser - Respiration is a chemical reaction occurring in living


    Breathing cells, breathing brings air into and out of your lungs.

    Key words: Lung Structure Exercise and breathing rate


    When you exercise, you require more oxygen
    Breathing: The movement of for working muscles to respire. This means you
    air in and out of the lungs. have to breathe faster to supply this oxygen.
    Trachea (windpipe): Carries Your heart rate also increases to send the blood
    air from the mouth and nose round your body more quickly.
    to the lungs.
    Bronchi: Two tubes which
    How are the alveoli adapted to their function?
    carry air to the lungs.
    Alveoli have a huge surface area to allow more
    Bronchioles: Small tubes in
    diffusion
    the lung.
    They have thin walls so that gases have a short
    Alveoli: Small air sacs found
    distance to travel
    at the end of each How do the lungs work? They have a good blood supply to remove
    bronchiole. Air containing oxygen enters the oxygenated blood quickly
    Ribs: Bones which surround lungs. In the tiny alveoli, oxygen
    the lungs to form the diffuses from the air sac into the
    ribcage. blood.
    Diaphragm: A sheet of Carbon dioxide diffuses in the
    muscle found underneath opposite direction and is then
    the lungs. breathed out.
    Lung volume: Measure of
    the amount of air breathed
    How does smoking damage the
    in or out.
    lungs? Websites that might be useful:
    Tar in cigarettes causes cells to https://www.bbc.com/bitesize/guides/zq349j6/revision/2
    Asthma reduces the diameter
    mutate and this causes cancer.
    of the airways and prevents air
    from reaching the alveoli. Nicotine is a very addictive drug. Extension ideas to research:
    Other chemicals in cigarette How are fish gills similar to lungs? How are they
    smoke like carbon monoxide different?
    contribute to heart disease, How do animals like worms and spiders
    emphysema and bronchitis. breathe?

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