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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 SKIN MUCOUS MEMBRANES Tightly packed cells Waterproof Hairs/cilia Mucus Sebum Sweat Tears Gastric Juice Saliva
Natural Killer Cells
Type of lymphocyte Next line of defence after skin and mucous membranes. Attack abnormal body cells
Inflammation Inflammation – the initial reaction of body tissue to infection or injury Results in area becoming painful, swollen, hot and red
Fever Raised body temperature Also known as PYREXIA Pyrogens (chemical messengers) reset the body’s thermostat Fever speeds up chemical reactions and phagocytosis
White Cell Count
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
Lymphatic System Spleen
End of part one
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Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation prepared by Christine L. Case M I C R.
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