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asthma
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Quizzes
A Yorkshire terrier dressed up as a veterinarian or doctor on a white background. (dogs)
A Visit with the Word Doctor: Medical Vocabulary Quiz
full human skeleton
Diseases, Disorders, and More: A Medical Quiz
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
44 Questions from Britannica’s Most Popular Health and Medicine Quizzes
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Hand washing. Healthcare worker washing hands in hospital sink under running water. contagious diseases wash hands, handwashing hygiene, virus, human health
17 Questions About Health and Wellness Answered
People wearing surgical masks (also called face mask or medical masks or safety masks) walk through the city center of Milan, Italy on Feb. 23, 2020. Coronavirus disease COVID-19 pandemic
How Do Face Masks Control the Spread of Disease?
tornado, digitally altered image. (storm; wind; clouds; natural disaster)
The Great Molasses Flood and 6 Other Strange Disasters
Discover
Calendar showing the month of February
Why Are There Only 28 Days in February?
Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere
Why Do Some Cicadas Appear Only Every 17 Years?
Fish. Lionfish. Lion-fish. Turkey fish. Fire-fish. Red lionfish. Pterois volitans. Venomous fin spines. Coral reefs. Underwater. Ocean. Red lionfish swims by seaweed.
10 of the World’s Most Dangerous Fish
Leon Trotsky
The Assassination of Leon Trotsky
Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland
The Largest Islands in the World
Black widow spider
9 of the World’s Deadliest Spiders
American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.
What’s the Difference Between Bison and Buffalo?

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During normal breathing, inhaled air travels through two main channels (primary bronchi)...
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