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The Human Body

Immune System and Trivia

Major Functions of Immune System Body's defense against disease causing organisms (pathogens). and it destroys dead/damaged cells from the body.
Major Organs of Immune System White Blood Cells, Spleen, and Thymus gland.
Thymus located between your lungs and behind your sternum where T-lymphocytes are made. Active in young people but becomes less active in adults
White Blood Cells Defends the body against pathogens.
Antibodies Chemicals that identify or destroy pathogens.
Pathogens organisms that cause disease or make you sick such as bacteria or viruses.
antibiotic a chemical that kills bacteria or slow their growth without harming body cells.
Body's First Line of Defense consists of barriers that keep pathogens from getting into the body.
skin defends the entire body until a cut occurs
Mucus, cilia, sneezing or coughing defends the respiratory system.
saliva defends the digestive system
Body's Second Line of Defense Inflammatory Response
Inflammatory Response occurs fluid and certain types of white blood cells leak from the blood vessels into nearby tissue so that white blood cells can attack the pathogens
Phagocyte white blood cells that engulfs pathogens and destroys them by breaking them down.
Body's third Line of Defense Immune system targets specific pathogens with Bcells and Tcells.
B-Cells White Blood Counts produce antibodies that destroy proteins
T-Cells White Blood Counts identify pathogens and distinguish one kind from another.
Active Immunity antibodies acquired by having the disease (chicken pox), getting a vaccine (polio)
vaccine a shot consists of pathogens that have been weakened or killed but can still trigger immune system into action
Passive Immunity The antibodies come from a source other than the person's body. Example from mother to unborn child
206 Number of bones in the body.
True Muscles work in pairs.
Average Heartbeat 72 beats/minute and 1.3 gallons per minute.
renal from the kidney
Complete digestion 20-30 hours
Created by: 200371966



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