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WorksheetsIGCSE Gas exchange in humans
Total questions: 10
Worksheet time: 8mins
Identify the structures in the image
(a)
What causes an increase in the volume of the thorax?
Abdominal muscles contracting
Diaphragm relaxing
External intercostal muscles contracting
Ribs moving downwards and inwards
How many cells thick is the wall of an alveolus?
1
2
3
4
What process is used for the movement of carbon dioxide from the blood into an alveolus?
(a)
Identify the structure in the image
(a)
Which structure is responsible for making sounds to enable speech?
Ribs
Larynx
Bronchioles
Diaphragm
How many alveoli are there in each lung?
250 thousand
250 million
250 billion
250
Identify the structures coloured red and blue in the image
(a)
Identify the blood vessel that carries deoxygenated blood to the lungs
Pulmonary vein
Aorta
Vena cava
Pulmonary artery
State the structures that protect the lungs
(a)
