Biology Paper 1
Human defences
Infection and Response training before the targeted original question drill.
Adaptive teaching card
Make it concrete
Analogy
Human defences is like a living system solving a small survival problem: each part has a job, and the answer depends on how those jobs connect.
Why now: An analogy helps when the definition feels abstract.
Do this: Match each part of the analogy to the science idea.
Learn it
Skin, mucus, cilia and stomach acid help prevent pathogens entering the body.
White blood cells destroy pathogens by phagocytosis and antibody production.
Antitoxins can neutralise toxins released by pathogens.