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Skeletal System Structures and Functions

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- The smallest bones are found in the ear.
- Over half of the bodies bones are in the hands and feet.
- The only joint-less bone in your body is the hyoid bone in your throat.

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How your muscular system works - Emma Bryce

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-  Muscles make up to 40% of your total body weight
- The smallest muscles are found in the middle of the ear.
- To take one step, you use 200 muscles.

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- There are 100 billion neurons in your brain alone.
-   A newborn baby's brain grows almost 3 times during the course of its first year.
- A new born baby loses about half of their nerve cells before they are born.

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The Cardiovascular and Lymphatic Systems

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Covers the cardiovascular and the basics of the lymphatic system. Also covers heart function and blood pressure.

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- your blood is always red, never blue
- The human heart is as big as your fist.
- In some cases, the lymphatic system diseases may even go ignored or unnoticed even for many years.

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- The right lung is slightly larger than the left.
- Hairs in the nose help clean the air we breath as well as warming it.
- The highest recorded "sneeze speed" is 165 km per hour.