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DEFENCE MECHANISMS OF THE BODY

DEFENCE MECHANISMS OF THE BODY. The Function of White Blood Cells. Non-Specific Resistance. Skin and Mucous Membranes Natural Killer Cells Phagocytosis Inflammation Fever. Skin and Mucous Membranes. Mucus. Tightly packed cells. Waterproof. Hairs/cilia. MUCOUS MEMBRANES. SKIN. Tears.

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DEFENCE MECHANISMS OF THE BODY

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  1. DEFENCE MECHANISMS OF THE BODY The Function of White Blood Cells

  2. Non-Specific Resistance • Skin and Mucous Membranes • Natural Killer Cells • Phagocytosis • Inflammation • Fever

  3. Skin and Mucous Membranes Mucus Tightly packed cells Waterproof Hairs/cilia MUCOUS MEMBRANES SKIN Tears Saliva Sebum Sweat Gastric Juice

  4. Natural Killer Cells

  5. Natural Killer Cells • Type of lymphocyte • Next line of defence after skin and mucous membranes. • Attack abnormal body cells

  6. Phagocytosis

  7. Inflammation • Inflammation – the initialreaction of body tissue toinfection or injury • Results in area becoming painful, swollen, hot and red

  8. Fever • Raised body temperature • Also known as PYREXIA • Pyrogens (chemical messengers) reset the body’s thermostat • Fever speeds up chemical reactions and phagocytosis

  9. White Cell Count

  10. Summary of Non-Specific Defence Bacteria/Virus SKIN AND MUCOUS MEMBRANES NATURAL KILLER CELLS AND PHAGOCYTOSIS (Plus Inflammation and Fever) LYMPHATIC FLUID AND/OR BLOOD

  11. Lymphatic System Spleen

  12. Lymphatic Tissue

  13. End of part one

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