TRACHEA

    Cards (4)

    • Trachea (windpipe) - allows air to flow into the lungs; reinforced by 15-20 C-shaped pieces of hyaline cartilage
    • Tracheobronchial tree - consists of the trachea and all other respiratory passageways in the lungs (bronchioles)
    • Bronchodilation - occurs when the smooth muscle relaxes, making the bronchiole diameter larger
    • Bronchoconstriction - occurs when smooth muscle contracts, making the bronchiole diameter smaller; happens during asthma attacks
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