Respiratory System Structure
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7 سال پیش
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The trachea brings air to and from the lungs. Air moves past the larynx, down the trachea, then splits into two bronchi, which then divide into many bronchioles within the lungs. At the ends of the bronchioles are alveoli (the sites of gas exchange).
Protecting the lungs are the ribs, which can move up and down with the help of the internal and external intercostal muscles. The diaphragm, a sheet of muscle beneath the lungs, also aids in breathing.
Cartilage surrounds the trachea and bronchi to provide structural support, prevent the airways from being squashed and blocked off.
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The trachea brings air to and from the lungs. Air moves past the larynx, down the trachea, then splits into two bronchi, which then divide into many bronchioles within the lungs. At the ends of the bronchioles are alveoli (the sites of gas exchange).
Protecting the lungs are the ribs, which can move up and down with the help of the internal and external intercostal muscles. The diaphragm, a sheet of muscle beneath the lungs, also aids in breathing.
Cartilage surrounds the trachea and bronchi to provide structural support, prevent the airways from being squashed and blocked off.
7 سال پیش
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