The Structure & Functions of the Cardio-Respiratory System (AQA GCSE Physical Education): Flashcards
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Three functions of nasal cavity
Three functions of nasal cavity
Filters air, warms it, humidifies it
What filters air in nasal cavity?
What filters air in nasal cavity?
Hairs
When does air enter through mouth?
When does air enter through mouth?
During intense physical activity
What two systems does the pharynx serve?
What two systems does the pharynx serve?
Respiratory and digestive systems
What does larynx contain?
What does larynx contain?
Vocal cords
Function of larynx
Function of larynx
Producing sound & passageway for air
What does trachea connect?
What does trachea connect?
Larynx to bronchi
What lines the trachea?
What lines the trachea?
Cilia and mucus
Function of cilia & mucus in trachea
Function of cilia & mucus in trachea
Trap and expel dust and particles
How many bronchi & where do they lead?
How many bronchi & where do they lead?
Two bronchi, each to one lung
What are bronchioles?
What are bronchioles?
Smaller air passages leading to alveoli
What are alveoli?
What are alveoli?
Tiny air sacs at end of bronchioles
Describe alveoli wall structure
Describe alveoli wall structure
Extremely thin, surrounded by capillaries
Where does gas exchange occur?
Where does gas exchange occur?
In the alveoli
What happens to O2 in gas exchange?
What happens to O2 in gas exchange?
Passes from alveoli into blood in capillaries