Homework ideas ◆ ◆ ◆
Coursebook questions 12.1 to 12.3 End-of-chapter question 1 Worksheet 12.1 Excretion crossword
Topic 2 The human excretory system Coursebook section 12.3 Teaching ideas ◆ ◆
Activity 12.1 The structure of the kidney, makes an attention-grabbing start to this topic. Care must be taken not to go into too much detail about the structure and function of a nephron. Use the level of the detail in the Coursebook as guidance. ◆ Before dealing with dialysis, it may be worth recapping on students’ earlier work on diffusion and osmosis. Common misunderstandings and misconceptions ◆ ◆
Students confuse urine and urea. They often appear to think that there is a direct connection from the alimentary canal to the kidneys, along which waste liquids flow. ◆ They confuse ureters and urethra. ◆ As in osmosis, they may find it difficult to think of individual molecules and ions when considering dialysis. Homework ideas ◆ ◆ ◆ ◆ ◆
Coursebook questions 12.4 to 12.11 End-of-chapter questions 2 and 3 Workbook exercise 12.1 The human excretory system Workbook exercise 12.2 Dialysis Worksheet 12.2 Excretory products and their removal
Original material © Cambridge University Press 2014 © Cambridge University Press 2014 IGCSE Biology
Chapter 12: Teaching ideas
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