Basic Structure & Appearance
The femur is the scientific name for your thighbone, and it’s the longest and strongest bone in your entire body!

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The femur is the scientific name for your thighbone, and it’s the longest and strongest bone in your entire body!
Inside your pancreas are thousands of tiny tubes that carry digestive juices, like a microscopic water park!
The medical name for your digestive system is the “gastrointestinal tract” or “GI tract” for short!
Your body has a special chemical messenger system called the endocrine system, which sends hormones throughout your body like tiny mail carriers!
A single drop of blood contains about 250 million red blood cells, which is more than the ~4,000 stars you can see in the darkest night sky!!