CAIE IGCSE Biology 10.1.4 Body defences
Practise linking body barriers and white blood cells to pathogen defence using diagrams, blood images and simple data tables.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- identify skin, nose hairs, mucus and stomach acid as barriers preventing pathogen entry
- distinguish phagocytes and lymphocytes by their roles in digestion or antibody production
- evaluate lymphocyte data by comparing treatment and control changes in a table
10.1.4—Body defences question 1
Fig. 6.1 is a diagram of the virus that causes measles.
Fig. 6.1
Viruses and some bacteria are pathogenic. Diseases caused by pathogens are transmissible.
The body has barriers to defend itself against pathogens.
State two mechanical barriers of the body.
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