The Circulatory System: An Amazing Circuit That Keeps Our Bodies Going By Kim Ann Zimmermann The heart, lungs and about 60,000 miles of blood vessels work together to keep blood pumping through our bodies.
The Human Skeletal System By Kim Ann Zimmermann Humans wouldn't get very far without bones — literally.
Social Anxiety Disorder: Causes, Symptoms and Treatment By Kim Ann Zimmermann Social anxiety disorder isn't just being shy.
Green Flash: The Beautiful and Elusive Sunset Phenomenon By Kim Ann Zimmermann Sometimes, at sunset, the sun appears to suddenly and briefly change color. Blink, and you'll miss it.
Generalized Anxiety Disorder: Causes, Symptoms & Treatment By Kim Ann Zimmermann People who experience generalized anxiety disorder (GAD) exhibit excessive anxiety and worry about multiple events or activities most days of the week.
Skin: The Human Body's Largest Organ By Kim Ann Zimmermann Skin is the body's largest organ and is the first line of defense against harm.
Immune System: Diseases, Disorders & Function By Kim Ann Zimmermann The job of the immune system is to protect against disease.
Reproductive System: Facts, Functions & Diseases By Kim Ann Zimmermann This may be the most important system in the body. Without the ability to reproduce, a species dies.
Urinary System: Facts, Functions & Diseases By Kim Ann Zimmermann The urinary system — also known as the renal system — produces, stores and eliminates urine, the fluid waste excreted by the kidneys
Lymphatic System: Facts, Functions & Diseases By Kim Ann Zimmermann The lymphatic system helps rid the body of toxins. Diseases of this system include lymphadenopathy, lymphoma and other disorders.
Endocrine System: Facts, Functions and Diseases By Kim Ann Zimmermann The endocrine system is a collection of glands that secrete hormones.
Nervous System: Facts, Function & Diseases By Kim Ann Zimmermann The network of nerves is the body's electrical wiring.
Chinese Culture: Customs & Traditions of China By Kim Ann Zimmermann Chinese culture reflects the customs and traditions of one of the largest countries in the world, with 1.34 billion people.
Aconcagua: Highest Mountain in South America By Kim Ann Zimmermann The Andean peak is also the highest in the Western and Southern hemispheres.
Italian Culture: Facts, Customs & Traditions By Kim Ann Zimmermann Italian culture, steeped in the arts, architecture, music and food, has flourished for centuries. Here is a brief overview of Italian customs and traditions.
History of Computers: A Brief Timeline By Kim Ann Zimmermann The history of computers starts with industrial and governmental needs, which led to huge machines and eventually the Internet, mobile phones and gaming systems.
Pleistocene Epoch: Facts About the Last Ice Age By Kim Ann Zimmermann The Pleistocene Epoch began about 2.6 million years ago and lasted until about 11,700 years ago.
French Culture: Customs & Traditions By Kim Ann Zimmermann The customs and traditions of France, center of fashion, art and architecture.
Indian Culture: Traditions and Customs of India By Kim Ann Zimmermann India is one of the world's oldest and most diverse cultures. Here is an overview of Indian customs and traditions.
Mexican Culture: Customs & Traditions By Kim Ann Zimmermann The culture of Mexico varies widely throughout the country, but traditions are highly valued.
American Culture: Traditions and Customs of the United States By Kim Ann Zimmermann Nearly every region of the world has influenced the customs and traditions of the United States.
What Is Culture? By Kim Ann Zimmermann Culture is the characteristics of a particular group of people, defined by everything from language, religion, cuisine, social habits, music and arts.
Great Facts About the Five Great Lakes By Kim Ann Zimmermann The Great Lakes — Superior, Huron, Michigan, Ontario and Erie — make up the largest body of fresh water on Earth.
