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AboutKidsHealth - The Hospital for Sick Children

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Exploring the Heart - The Circulatory System! | AboutKidsHealth at The Hospital for Sick Children

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- The adult human body has 206 bones.
- There are 26 bones in the human foot.
- The femur is the longest and strongest bone in the body.

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How your muscular system works - Emma Bryce

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- Muscles make up 40% of total body weight.
- Muscles cannot push, they can only pull.
- The smallest muscles are found in the ear.

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If you've ever wondered how your brain and nervous system work, this movie about the Nervous System has the answers!

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- There are more nerve cells in the human brain than there are stars in the Milky Way.
- If are your neurons were lined up it would be around 965 km long.
- There are 100 billion neurons in your brain.

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- The heart is as big as your fist.
- The left side of the heart and the right side have different jobs.
- Blood comes in different shades of red.

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14) The lymphatic system The lymphatic system provides the central structure of the immune system. It is made up of an intricate network of vessels that connect hundreds of lymph nodes as well as several key organs.

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- It drains all of the waste materials that are produced by every cell within the body.
- Tonsils are actually a large cluster of lymphatic cells.
- The largest organ within the lymphatic system is the spleen.

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Respiratory System, Part 1: Crash Course Anatomy & Physiology #31

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- The right lung is slightly larger than the left.
- Hairs in the nose help to clean the air we breathe as well as warming it.
- The surface area of the lungs is roughly the same size as a tennis court.

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- 1.7 liters of saliva is produced each day.
- We eat about 500kg of food per year.
- An adult's stomach can hold approximately 1.5 liters of material.

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Excretory System Parts and Functions Animation video for kids

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- Most humans will urinate about 3,000 times per year.
- The largest vein in the body goes through the kidney.
- The average person breathes more than 6 million times over the course of their average life.