Exam (elaborations)
HUMAN BREATHING SYSTEM LEAVING CERT EXAM QUESTIONS AND ANSWERS
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HUMAN BREATHING SYSTEM LEAVING CERT EXAM QUESTIONS AND ANSWERS
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HUMAN BREATHING SYSTEM LEAVINGCERT EXAM QUESTIONS AND
ANSWERS
Human breathing system - Answer-[extra labels needed]
Nostrils - Answer-allow air to enter the nose
Nose - Answer-warms, filters and moistens air
Pharynx - Answer-connects mouth and nose to larynx
Epiglottis - Answer-stops food/drink entering the trachea
Larynx - Answer-contains vocal chords
Trachea - Answer-allows air to pass to lungs
Cartilage - Answer-keeps trachea and bronchi open
Function of lungs - Answer-takes in O2 and gets rid of CO2
Bronchus - Answer-transports air into lungs
Bronchiole - Answer-transports air to alveoli
Alveoli - Answer-site of gaseous exchange
Pleural membranes - Answer-allow friction free movement of lungs
The lungs - Answer-- located in thorax region
- all the air pipes are lined with mucus secreting cells and cilia which move the mucus
containing the trapped pathogens
Gaseous exchange in alveoli - Answer-- alveoli are very plentiful to increase surface are
- the air in alveoli is O2 rich but the blood in capillaries in O2 poor, so O2 diffuses from
the alveoli into the blood capillaries
- CO2 is high in the blood capillaries but low in the alveoli so it diffuses out of the
capillaries into the alveoli
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