English National Curriculum - Science Science

7. Explore defence systems

Mission Objectives

Understand the primary and secondary defence systems of the body

Explain how phagocytes, lymphocytes, and antibodies work to defend against pathogens

Evaluate the effectiveness of different defence systems

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Keywords

Words and meanings to learn

sebum

Waxy, oily substance created by the body's sebaceous glands which can kill bacteria.

protective

The act of of defending against something.

hydrochloric acid

A corrosive and slightly yellowed liquid used in industrial and chemical processes.

immune system

Processes and organs in the body which help to resist against toxins and infections.

cilia

Tiny hairs which can be found in the bronchi and trachea to prevent pathogens reaching the lungs.

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Required Resources

Resources: PowerPoint presentation, whiteboard and markers, access to online research materials

Handout: Examination practice questions and answers

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