GCSE Biology AQA - Human Defence System | Fighting Pathogens [2026 exams]

**Content covered:**
This lesson covers human defence systems (AQA 4.3.1.6), including non-specific defences like skin, mucus, and stomach acid. You’ll also learn how white blood cells protect the body through phagocytosis, antibody production, and antitoxin production, and how these responses work together to fight pathogens.

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All of Paper 1 Playlist:
https://www.youtube.com/playlist?list=PLqDkwnG6EtcKmYPasAs6mbpPB_GB9Oy9T

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Видео GCSE Biology AQA - Human Defence System | Fighting Pathogens [2026 exams] канала Learn with a Scientist