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Disease

Disease. Does not allow the body to function normallyCan affect individual organs or an entire body systemDivided into two groups

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Disease

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    1. Disease Pages 329-343

    2. Disease Does not allow the body to function normally Can affect individual organs or an entire body system Divided into two groups –infectious and non-infectious

    3. Infectious Disease A disease that can be passed from organism to organism Caused by tiny organisms called PATHOGENS

    4. 4 KINDS OF PATHOGENS Bacteria Viruses Fungi Protist

    5. Pathogens can come from Another person

    6. Contaminated objects

    7. Animal bite

    8. Environment

    9. Immune System responsible for distinguishing (telling the difference) between the different kinds of pathogens Reacting to each kind according to its type

    10. When a pathogen enters the body It works by damaging individual cells within the organs In some cases it attacks an entire body system

    11. Some Infectious Diseases You Should Know Colds Flu Strep Throat Athlete’s Foot AIDS

    12. Colds Illness caused by a viral infection located in the respiratory system The cold virus multiplies and attacks the mucous membranes of the nose and throat causing the common effects of the cold (sore throat, runny nose, fever…) Cold can not be treated with an antibiotic because it is caused by a virus

    13. Flu Influenza, commonly known as “the flu”, is a highly contagious viral disease of the respiratory system Typically causes fever, muscle aches, and a more severe cough than the common cold and usually lasts longer

    14. Athlete’s foot Common fungal infection of the skin of the feet May be contracted from public environments Grows in the warm and moist environment usually between the toes Difficult to cure

    15. AIDS Acquired immunodeficiency syndrome (AIDS) Caused by the human immunodeficiency virus (HIV) The virus attacks the cells in the immune system making the organism unable to fight off other pathogens that may attack the body

    16. Strep Throat Contagious disease caused by bacterial infection Symptoms include fever, pain, redness and swelling of the throat and tonsils May produce mild or severe symptoms

    17. Let’s follow the journey of a pathogen as it attacks its victim!

    19. What type of pathogen is Salmonella?

    20. What was the source of the pathogen? Salmonella is a bacterium

    22. What is the first defense? Source of the pathogen Contaminated food

    24. What does the body do next to try and get rid of the pathogen? Stomach acid destroys some of the bacteria Macrophages try to destroy the Salmonella

    26. How does Salmonella attack the body? Enters the cells of the villi and destroys them The destroyed cells release distress chemicals

    28. How does Salmonella cause your body to ache? The waves of peristalsis are so rapid that the large intestine is unable to absorb the water

    30. Does the medicine kill the Salmonella? The chemicals released from the cells leak into the blood stream and go into the muscle tissue

    32. How does the immune system begin to respond to the Salmonella invasion?

    34. The immune system identifies the pathogen and produces helper cells Helper cells “help” the macrophages to do their job – destroy the Salmonella

    36. Non-infectious Diseases Not caused by pathogens in the body Not spread from organism to organism

    37. Non-infectious Diseases are caused by malfunctions in the body. Heredity – information you get from your parents The environment – examples are sun, radiation, chemicals Lifestyle choices – smoking, drugs, alcohol

    38. Types of Noninfectious Diseases Diabetes Asthma Parkinson’s disease Skin Cancer

    39. Diabetes A disease that results in glucose (sugar) level being higher than normal. It is caused by the person’s inability to either produce or use properly a natural chemical made in the body (pancreas) called insulin.

    40. Diabetes may lead to Kidney disease Heart disease Vision problems

    41. High levels of blood sugar lead to disorders Like an increase in problems with circulation

    42. Parkinson’s Disease Disease of the nervous system that occurs when nerve cells in the brain stop functioning properly, affecting the muscular system

    43. Parkinson’s Disease Major symptoms Severe shaking (tremors) Disabilities involving movement At present, there is no cure

    44. Skin Cancer Disease in which skin cells found in the outer layers of the skin become damaged.

    45. Factors that lead to Skin Cancer Damaging ultraviolet rays (UV) from the sun or tanning beds heredity

    46. Asthma Affects the lungs and the airways that deliver air to the lungs Causes periodic attacks of wheezing and difficulty breathing

    47. Asthma attacks Occur when the airways become inflamed in response to a stimulus, such as dust, mold, pets, exercise, or cold weather Some attacks start for no apparent reason

    48. Resources Body Story: Germs. Discovery Channel School. 2002. unitedstreaming. 5 December 2006 <http://www.unitedstreaming.com/>

    49. www.a1organics.com/images/pathogens.jpg www.monografias.com/trabajos5/virus/Image166.gif www.uwlax.edu/.../Visuals/athletesfoot.jpg www.ucmp.berkeley.edu/.../paramecium1.gif www.fordogtrainers.com moon.ouhsc.edu www.wcasohio.org www.kidsplanet.org www.missouri.edu tiee.ecoed.net www.moea.state.mn.us colds.upmc.com

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