Key ideas1 of 3
Engulf and digest
Some white blood cells surround a pathogen, take it inside and digest it. This is called phagocytosis. Watch the stages, then replay them.
Phagocytosis means engulfing and digesting a pathogen.
Biology Paper 1 · B3 · Lesson 3.7
White blood cells and immunity
Engulf pathogens, make antibodies and neutralise toxins.
No timer. Read the explanation after each answer.
Lesson questions complete
Topic resources and sources
Daily 5 · Exam practice · Download the A4 revision sheet
Core content is shared by Foundation and Higher Tier. Challenge questions ask you to explain and apply it.
AQA Combined Science Trilogy specification · 4.3.1.6. Notes, questions and diagrams are original teaching material.
Rose leaf: LiquidGhoul / Wikimedia Commons, public domain. Mosquito: CDC / Jim Gathany, PHIL 5814, public domain. This photograph shows a vector species; it does not establish that this individual carries malaria.