Gas exchange in humans — Cambridge IGCSE Biology
The breathing system, how the lungs are adapted for gas exchange, how ventilation works and how breathing changes with exercise.
Revision notes
6 short notes, in the order of the specification.
- The breathing system
- Features of gas exchange surfaces
- Breathing in and out (ventilation)Supplement
- Inspired and expired airPractical
- Physical activity and breathingPractical
- Protecting the breathing systemSupplement
Exam questions
8 exam-style questions (25 marks), each with its mark scheme.
Answer the questionsFlashcards
24 cards: flip them, mark what you knew, and practise the rest.
Practise the cardsMind map
The whole of gas exchange in humans on one page, so you can see where this subtopic fits.
Open the mind mapPractical sheets
Method, variables, risks and a results table, with questions to answer.
Print it
Free PDFs to print or save.