Excretion — Edexcel International GCSE Biology
Excretory products of the lungs, kidneys and skin, and how the kidney filters blood, reabsorbs useful substances and controls water with ADH.
Revision notes
5 short notes, in the order of the specification.
- Excretion: lungs, kidneys and skin
- The kidney and the urinary systemBiology only
- The nephron and ultrafiltrationBiology only
- Selective reabsorption and urineBiology only
- ADH and the water content of the bloodBiology only
Exam questions
7 exam-style questions (22 marks), each with its mark scheme.
Answer the questionsFlashcards
15 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 mapPrint it
Free PDFs to print or save.