Body Parts
Body Parts work together to perform different functions required for life. Learn how your internal organs operate in this section. See more »
what's inside: anatomy channel
Anatomy covers the structure and functions of the body's organs and systems. Learn how these components work in harmony to sustain human life.
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Body Systems
Your body is pretty amazing. At any given point you have many biological processes going on -- circulatory, digestive, brain & central nervous systems and more. Learn about these body systems as well as the eye, ears, nose and throat. See more »
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Cells & Tissues
Cells & Tissues are the building blocks for human organs. Learn about the structure and function of cells and tissues. See more »
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featured articles
Does gum really stay in you for seven years?
Whether you chew to freshen your breath or blow a big bubble, you probably shouldn't swallow gum. But does it really stay in your body for seven years if you do?
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videos: anatomy
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How Your Appendix Works
Does the appendix serve any purpose in the human body? Scientists are divided on the issue -- learn why.
How Refractive Vision Problems Work
Millions of people have refractive vision problems -- when the eyes get blurry or can't focus on an object. Learn about four major types of refractive vision problems.
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