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Circulatory System

Circulatory System. Heart 2. Blood vessels 3. Blood. Heart pumps blood through blood vessels to lungs In lungs, red blood cells loaded with oxygen Arteries carry oxygen rich blood to body Arteries divide into capillaries.

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Circulatory System

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  1. Circulatory System Heart 2. Blood vessels 3. Blood

  2. Heart pumps blood through blood vessels to lungs • In lungs, red blood cells loaded with oxygen • Arteries carry oxygen rich blood to body • Arteries divide into capillaries

  3. In capillaries, blood cells drop off oxygen and nutrients and collect waste products including carbon dioxide • Blood travels back to the heart and lungs through veins • Red blood cells deposit carbon dioxide in the lungs

  4. Blood is a mixture of plasma and three different types of blood cells: • Red blood cells (carry oxygen to body) • White blood cells (fight disease) • Platelets (stop bleeding)

  5. CLOGGED ARTERIES • Fat in blood sticks to side of arteries, limits amount of blood that can pass through • Can cause high blood pressure, stroke or heart attack

  6. HEART ATTACK

  7. HEART ATTACK

  8. LYMPHATIC SYSTEM • Produces white blood cells that fight germs and infections • Traps foreign particles • White blood cells are transported through body in a pale fluid called lymph

  9. LYMPH NODES • Oval tissue • Filled with white blood cells • In strategic locations (neck, abdomen, groin, armpits) • Filter and destroy foreign matter like bacteria • When they are fighting they swell up

  10. LYMPHATIC SYSTEM • White blood cells are created in bone marrow • Tonsils prevent germs from entering your body through your throat

  11. COMMUNICABLE AND NONCOMMUNICABLE DISEASE Noncommunicable disease can’t be spread directly from person to person: • Hereditary diseases • Poor nutrition • Risky behaviors (ie: smoking)

  12. COMMUNICABLE AND NONCOMMUNICABLE DISEASE Communicable disease can be spread directly from person to person. Is contagious. • Epidemic: a disease that is spreading rapidly • Diseases from humans/animals • Ex: Cold, flu, rabies • Can be spread by coughing, sneezing, touching, sharing drinking glasses and eating utensils • Can be due to bacteria or viruses

  13. Bacterial diseases Bacteria are tiny organisms that cause disease. Examples: • Tetanus • Tuberculosis • Typhoid fever

  14. Viral diseases Viral diseases are caused by tiny organisms called viruses. They invade living cells and inject their DNA into the host cells. Examples: • Common cold • Chicken pox • Rabies • Mononucleosis • Polio

  15. Bacteria and viruses invade the body, this activates the immune system

  16. Antibodiesare produced to defeat a specific bacteria or virus • An Antigen is a specific chemical label that the antibody can attach to, it fits like a lock and key

  17. ANTIBIOTICS • Antibiotics are drugs that kill bacteria • Penicillin is an antibiotic • It was discovered by Dr. Alexander Fleming in 1928 • Antibiotics do not kill viruses

  18. VACCINES • A vaccination protects people against a disease by stimulating the body to produce antibodies • Not all diseases have vaccines yet, such as AIDS caused by HIV

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