Gas exchange in humans — Edexcel International GCSE Science (Double Award)
The structure of the thorax, how ventilation works, how alveoli are adapted, the effects of smoking and the breathing practical.
Revision notes
5 short notes, in the order of the specification.
- The structure of the thorax
- Ventilation: breathing in and out
- Alveoli and gas exchange
- Smoking, the lungs and the circulatory system
- Practical: breathing, carbon dioxide and exercisePractical
Exam questions
7 exam-style questions (24 marks), each with its mark scheme.
Answer the questionsFlashcards
13 cards: flip them, mark what you knew, and practise the rest.
Practise the cardsMind map
The whole of structure and functions in living organisms on one page, so you can see where this subtopic fits.
Open the mind mapPractical sheet
Method, variables, risks and a results table, with questions to answer.
Print it
Free PDFs to print or save.