Key terms for disease unit
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| virus | The smallest and simplest pathogen (something that causes disease). Viruses are NOT alive. Examples: flu, ebola, chicken pox, cold
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| bacteria | simple 1-celled organism that is not always harmful
Examples: strep throat, pink eye
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| fungi | More complex than bacteria but cannot make their own food (not a plant)
Examples: ringworm, athlete's foot
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| protozoa (protist) | one-celled organism more complex than bacteria
Examples: malaria, dysentery
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| pathogen | something that causes disease
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| infectious | disease that can be passed from one person to another by spreading germs
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| disease | a breakdown in structure or function of a living organism
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| epidemiologist | a scientist who maps spread of disease through a population
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| carriers | a PERSON who spreads a disease but does not get sick from the disease themselves
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| vector | an organism (NOT a person) that spreads disease usually without getting sick themselves
Examples: Mosquitos, rats, fleas
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| Cell Theory | The idea that cells come from other cells, all living things are made of cells, and cells are the basic unit of life. This idea came from several scientists - Schwann, Schleiden, and Virchow.
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| Germ Theory | Specific diseases are caused by specific germs
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| Immune System | A system of our body that protects us from infection and disease
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| Disease | anything that causes the body to not function properly
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| Communicable disease | A pathogen caused disease that can spread to other people
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| germs | micro organisms, some of which cause diseases
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| antibodies | created by the immune system to fight and kill diseases that enter the body
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| antigen | part of a pathogen (invader in the body) that tells the body to attack and kill the pathogen
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| antibiotic | a chemical that kills BACTERIA
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| lymphatic system | the secondary circulatory system in the body that allows parts of the immune system to move around the body
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| infection | when pathogens get into the body and multiply
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| inflammation | redness, swelling, and sometimes heat around an injured part of the body
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| vaccine | A shot given to PREVENT a disease
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