Your Bodys Defense Physical Defenses o First line
Your Body’s Defense
Physical Defenses o First line of defense o Skin o Hair o Mucous o Cilia o Saliva o Tears o Sweat o Digestive tract
Skin o Protects from micro-organisms entering the body o Open cuts/ sores provide entrance o Cells die and are shed
Sweat o Our body has many sweat glands o Sweat is released to control body temp o Sweat contains acids that kill pathogens
Mucous Membranes o Moist linings around all entrances to body o Mucous = sticky substance o Mucous traps pathogens
Saliva & Tears o Contain enzymes that fight pathogens o Tears wash away foreign substances
Cilia o Tiny hair-like structures o Trap pathogens o Help remove mucous from body
Digestive Tract o Moves pathogens out of body o Acids/ chemicals in digestive tract o Chemicals kill pathogens
Second Line of Defense o Occurs after pathogen enters the body o Inflammation
Inflammation o 1 st stage of healing o Increased blood flow to area o Increased size/ temperature/ redness o Caused by dilation of blood vessels
Immune System o Last line of defense o Lymphatic system, lymph nodes, lymphocytes o Lymph - fluid containing lymphocytes o Lymphocytes - white blood cells
Immunity o Active Immunity-body creates antibodies n Through sickness of immunization o Immunization/ vaccine – injected with small amount of pathogen o Passive Immunity-passed from mother to child through birth or breast milk
Treatment o Antibiotics – kill living organisms n Treat bacterial infections only o Fungus are treated with cream or topical treatment
Treatment of Virus o Anti-viral can stop a virus from reproducing n n Most viruses are fought by our immune system with… Rest Proper diet Water
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