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"The birds and the bees": Meaning and origin of the phraseReference "The birds and the bees" is a story parents tell their children to deflect the question "Where do babies come from?" The phrase refers to the talk about sex.
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10 common skin conditionsHere's a countdown of 10 common skin conditions, some benign and others life-threatening.
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Skin: Facts about the body's largest organ and its functionsThe skin is the body's largest organ and performs many vital functions.
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What is normal blood pressure?Here's what doctors consider a "normal," elevated or high blood pressure, and how to measure your BP at home.
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The nervous system: Facts, function and diseasesReference The network of nerves is the body's electrical wiring.
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Social anxiety disorder: Causes, symptoms and treatmentSocial anxiety disorder causes significant discomfort about social interactions.
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Panic disorder: Causes & symptoms of panic attacksREFERENCE Panic disorder is marked by sudden episodes of intense fear, known as panic attacks, that can trigger physical symptoms.
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Generalized anxiety disorder: Causes, symptoms & treatmentPeople with generalized anxiety disorder experience constant feelings of anxiety that affect their everyday life.
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American culture: Traditions and customs of the United StatesReference Nearly every region of the world has influenced the customs and traditions of the United States.
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Immune System: Diseases, Disorders & FunctionThe job of the immune system is to protect against disease.
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The lymphatic system: Facts, functions & diseasesReference The lymphatic system helps rid the body of toxins. Diseases of this system include lymphadenopathy, lymphoma and other disorders.
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Reproductive System: Facts, Functions & DiseasesThis may be the most important system in the body. Without the ability to reproduce, a species dies.
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The Circulatory System: An Amazing Circuit That Keeps Our Bodies GoingThe heart, lungs and about 60,000 miles of blood vessels work together to keep blood pumping through our bodies.
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Chinese Culture: Customs & Traditions of ChinaChinese culture reflects the customs and traditions of one of the largest countries in the world, with 1.34 billion people.
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Italian Culture: Facts, customs & traditionsREFERENCE Italian culture goes back to the ancient, had a massive impact on the Renaissance and is represented in the world today by its art, fashion and popular food.
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Internet history timeline: ARPANET to the World Wide WebReference Al Gore didn't invent the Internet. Vinton Cerf & Bob Kahn are often called Fathers of the Internet.
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Pleistocene epoch: The last ice ageThe Pleistocene epoch lasted from about 2.6 million to 11,700 years ago and included the last ice age, when glaciers and giant megafauna dominated the landscape.
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Indian culture: Customs and traditionsReference India is one of the world's oldest and most diverse cultures. Here is an overview of Indian customs and traditions.
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Mexican culture: Customs and traditionsReference Mexican culture varies widely throughout the country, but traditions are highly valued as is its long and storied history.
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French culture: Customs & traditionsReference Discover the world of French culture, the customs and traditions of France, as well as how it became a center of fashion, art and architecture.
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What does the endocrine system do?Facts and information about the endocrine system.
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Respiratory system: Facts, function and diseasesThe respiratory system is responsible for taking in oxygen and expelling carbon dioxide. The main organs are the lungs, which work in concert with the cardiovascular system.
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The Human Skeletal SystemHumans wouldn't get very far without bones — literally.
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German Culture: Facts, Customs and Traditions
