The lungs (AQA GCSE Biology Combined Science): Quizzes
📚Quizzes
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10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the correct pathway air takes through the respiratory system?
What is the correct pathway air takes through the respiratory system?
Trachea → bronchi → bronchioles → alveoli
What does the trachea split into?
What does the trachea split into?
Two bronchi, one for each lung
What is the approximate total surface area of all the alveoli?
What is the approximate total surface area of all the alveoli?
How thick are the walls of the alveoli?
How thick are the walls of the alveoli?
One cell thick
What are the tiny blood vessels surrounding each alveolus called?
What are the tiny blood vessels surrounding each alveolus called?
Capillaries
During gas exchange, which direction does oxygen move?
During gas exchange, which direction does oxygen move?
From alveolar air into the blood
During gas exchange, which direction does carbon dioxide move?
During gas exchange, which direction does carbon dioxide move?
From blood into alveolar air
What percentage of oxygen is in exhaled air?
What percentage of oxygen is in exhaled air?
16%
What percentage of carbon dioxide is in inhaled air?
What percentage of carbon dioxide is in inhaled air?
0.04%
Why do alveoli have very thin walls?
Why do alveoli have very thin walls?
So gases don't have far to travel