Lecture 14

An Introduction to the Lymphatic System and Immunity. Pathogens . Microscopic organisms that cause disease: Viruses. Bacteria. Fungi. Parasites. Each attacks in a specific way . 22-1 Overview of the Lymphatic System. The . Lymphatic System. Protects us against disease. Lymphatic system cells respond to: Environmental pathogens. Toxins. Abnormal ... ................
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