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practical and positive
perfumes causing respiratory problems in others
Key Concept: Hygiene for everyone
eye safety
The Immune System: Our Internal Defender +Health/Safety practical and positiveThis program explores the complex and remarkable immune system and its vital role in the defense of our bodies. It introduces students to the microorganisms and minute foreign particles surrounding us at all times, including the infectious viruses and bacteria that threaten us when these foes break through the body's outer defenses. It explores the nature of immunity, graphically presents phagocytes, T cells, and B cells, the defending heroes of the
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