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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.
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Why do my ears pop when I dive in the deep end of the pool?
Your ears are very sensitive to the air or water pressure around them. But just what happens when you dive into that pool?
Why are boogers sticky?
You may never have thought about it (unless your child asks), but boogers are sticky for a perfectly logical scientific reason.
How much oxygen does a person consume in a day?
You breath all day, every day. How much oxygen does this process consume?
How Blood Works
When you cut yourself accidentally, do you ever wonder what makes up this thing we call blood? It's pretty amazing stuff, considering how it wards off infections while supplying nutrients to every cell in the human body.
How Your Heart Works
The heart is a vital organ that basically serves as a pump. Learn about heart chambers and valves, blood flow, the heart's electrical system and blood supply. Read more about how this amazing organ works.
How Your Immune System Works
There are millions of bacteria, microbes, viruses, toxins and parasites that want to invade your body. And they'd happily do it, too -- if it weren't for your immune system.
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