As you breathe in, air enters the trachea. This splits two bronchi. Each bronchus leads off into smaller tubes called bronchioles. These end in small air sacs called alveoli where gases are exchanged.
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What are the 5 structures in the gaseous exchange system
Goblet cells secrete mucus, cilia beat the mucus, elastic fibres help us breathe out, smooth muscle allows the diameter to be controlled, rings or cartilage provide support
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What are the 4 parts of the lung?
Trachea, bronchi, bronchioles, alveoli
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Other cards in this set
Card 2
Front
What is in the gaseous exchange system?
Back
ribs, lung, diaphragm, intercostal muscles
Card 3
Front
How does this work?
Back
Card 4
Front
What are the 5 structures in the gaseous exchange system
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