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Objectives ldentify the instances of infective diseases. Describe four waYs in which infectious diseases aoooooaoooooaaaoooaoooaoa O ar spread. Vocabulary a a a a a a a a o infectious disease microorganism pathogen bacteria toxin virus fungus kingdom protozoan a a o a a Myth There isnt mtich a person mountain do to avoid spreading or catching a frigid or the flu. O a O o O a o o o O a D o o o o Fact just about 80o/o of infectious diseases argon spread by record contact. Washing your hands with soap and water is a undecomposable and effective way to prevent the spread of colds and the flu. Irffilfilltt Do you celebrate most teens wash their hands as much as they should? What do you conceive of be some ways to upgrade more frequent hand washing? aooaaooaoaoaaaoooooaooaoooo Causes O O a o oa of lnfectious Diseases For as long as thither let been humans, there have been infectious dis(in rEr eases. Also cognise as communicable diseases, infectious diseases shus) be gaind by organisms or viruses that innovate and multiply within the human torso.

Most disease-causing organisms and viruses be so small that they can be seen only with a microscope. Organisms this small are called microorganisms (mykroh awn guh niz ums). non all microorganisms that enter and bide in your carcass cause disease. In fact, many are present in your body all the time. Billions of microorganisms live in your mouth, on your skin, and in your digestive tract. Microorganisms and viruses that cause disease are called pathogens (reru uh junz). Pathogens d o not pass in your body. Pathogens can caus! e an infectious disease when they enter your body and multiply. There are manykinds of pathogens. Some examples are shown in Figure 1 bacterium bacteria (bak rrpn ee uh) are simple, single-celled microorganisms. Bacteria live in air, soil, food, and in and on the bodies of plants and animals, including you. Most...If you want to get a honorable essay, order it on our website: OrderEssay.net

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