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The Skeletal System: Crash Course Anatomy & Physiology #19

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1.)The smallest bones are found in the ear
2.)The longest bone is the femur
3.)Over half the body's bones are in the hands and feet.

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Big Guns: The Muscular System - CrashCourse Biology #31

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1.)The smallest muscle in found in the ear
2.)Muscles cant push
3.)To take one step,you use 200 muscles

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The Nervous System, Part 1: Crash Course Anatomy & Physiology #8

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1.)There are more nerve cells in the human brain than there are stars in the Milky Way.
2.)There are 100 billion neurons in your brain alone.
3.)There are about 13, 500,00 neurons in the human spinal cord

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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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1.)Lymphatic system works in coordination and collaboration with the lymphoid system, immune system and cardiovascular system.
2.)The right lymphatic duct measures only about 1.25 centimeter (cm) in length, while the thoracic duct may measure as long as 45 cm
3.)In certain organs of your body, such as, groin, neck and underarms, the lymph nodes are found in large number.

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

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1.)The right lung is slightly larger than the left.
2.)The breathing rate is faster in children and women than in men.
3.)The capillaries in the lungs would extend 1,600 kilometres if placed end to end

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The Digestive System: CrashCourse Biology #28

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1.)The average person pees about 3000 times a year.
2.)The human intestine is usually 27 feet long and 10 inches. (8.5 meters long)
3.)The average adult bladder can hold 16-24 ounces of urine.