What is a microorganism?, Organisms that are so small that can be seen only with a microscope., Organisms that are so big that can be seen normally.., Where can microorganisms be found in our bodies?, They are on our clothes and shoes., They are on your skin, in your mouth, and in your digestive system., What is the body’s first defense?, The hands., The skin., What are other of your body’s defenses against invading microorganisms?, Tears, mucus, and saliva., Hair, hands, and feet., What is a pathogen?, Microorganisms that cause some diseases., Microorganisms that make you feel happy., What is an infectious disease?, It is a disease that never passes to anyone else.., It is a disease that can pass from one organism to another., What are examples of pathogens?, Bacteria and viruses., Mucus and saliva., What is a characteristic of viruses?, They are about 100 times smaller than most bacteria., They are about 100 times bigger than most bacteria., What are some ways to stay healthy?, Wash your hands before you eat and wash objects before you use them., Never wash your hands., How are fungi good?, They eat dead matter and help decompose organic material, They eat plastic and create organic material., They make dead matter and organic material, What do protozoans do?, They create a lot of bacteria., They act as nature’s clean-up crew by eating bacteria., They don't eat any other microorganisms.

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