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Defense

Defense. External Defense: Integumentary System Internal Defense: Respiratory System Digestive System Circulatory System Lymphatic System Immune System. Defense. Defense: Skin, Mucus, Enzymes & Acid. External Line of Defense:. Skin Function: Why do we have Skin ??

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Defense

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  1. Defense External Defense: • Integumentary System Internal Defense: • Respiratory System • Digestive System • Circulatory System • Lymphatic System • Immune System

  2. Defense Defense: Skin, Mucus, Enzymes & Acid External Line of Defense: Skin • Function: • Why do we have Skin ?? • Provide a barrier to Bacteria, Viruses, Fungi, Protist & parasites • Structures: • Sweat & Oil glands secrete acid

  3. Defense Internal Defense Respiratory System: • Function: • Traps Pathogens with Cilia & Mucus • Enzymes • Structures: • Cilia ( hair) • Mucus Membrane

  4. Defense Internal Defense Digestive System • Function: • Kills pathogens with Enzymes • Acid (Hydrochloric acid) • Mucus • Structure: • Salivary glands • Stomach glands • Intestinal glands Produce Acid & Enzymes

  5. Defense Internal Defense Circulatory System: • Function: • Contains White Blood Cells • Surround & digest pathogens • System: • White Blood Cells • Produce Antibodies • Target Antigens • A protein on the surface of an infected cell

  6. Defense Internal Defense Lymphatic System/ Immune System: • Functions: • Defends against Germs • Lymphocytes destroy Bacteria • Killer T –cells • White Blood Cells • B-cells: Antibodies • Remove excess Tissue Fluids (Lymph) • filters & purifies Lymph fluid • Produces Antibodies that stay in the blood

  7. Defense Internal Defense Lymphatic System/ Immune System: • Structures: • Lymph nodes • Lymph Vessels • Lymphocytes: T-cells & B-cells • Antibodies

  8. Defense Natural Killer Cells Internal Defense Specific Immunity: • Functions: • Targets & destroys cells with foreign Antigens • Makes Antibodies • B-cells • Structures: • Lymphocytes called T cells: • Helper T – cells • Stimulate B-cells • Stimulate Killer T -cells • Killer T –cells • Destroy pathogens • Lymphocytes called B cells: • Make Antibodies

  9. Defense Working Together • Both External & Internal Defenses keep your body germ free & healthy • Homeostasis Nate’s Immune System Cartoon

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