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The Cardiovascular system can also be referred to as the Circulatory system.

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The muscular and skeletal systems are sometimes put together to be called the muscularskeletal system.

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This systems refers to the parts that cover the outside of the body.

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This is a system of muscles which allow our body to move.

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Components: Heart, blood, and blood vessels. The system delivers oxygenated blood from the heart to the rest of the body and returns the blood to the heart to be oxygenated again.

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Ligaments are a short band of tough, flexible connective tissue which connects two bones or cartilages or holds together a joint.
DID YOU KNOW:That we have over 900 ligaments in our body

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Components: Brain, spinal cord, and nerves. What the system does:
Recieves, processes and responds to all physical stimuli; for exam,ple, if you burn your hand on the stove, this system prompts you to remove your hand from the stove

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Components: Nose, nasal cavity, trachea, lungs, and blood. The system Inhales air, uses the oxygen in the air to release energy, and exhales the carbnon dioxide that results from ths process.

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Components: Mouth, esophagus, stomach, small and large intestines, rectum, and anus.This system breaks down food into smaller substances that the body can absorb and process into energy and eliminates the resulting waste.

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The total of eyelashes shed by a human in their life is over 98 feet (30m)

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The average hair a an average human has is about 100, 000 hairs.

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The busiest muscle in your body is your eye muscles. They may move more than 100,000 times a day.

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This system is powered by the heart and it also protects the body from infections and diseases. It also gets rid of all the waste

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The skeletal system has 6 main functions:
1)Protection:The cranium and ribs protect the brain andvital organs in the chest.
2)Shape: Gives shape to the body which makes you tall or short.
3)Support: Holds your vital organs in place while playing sport. The vertebral column holds your body up.
4)Movement:Muscles are attached to the bone, which are jointed, when the muscles contract, the bones move.
5)Blood Production: Red bood cells (which carry oxygen in and out) and white blood cells (which protect against infection) are made in the bone marrrow of most bones.

6)The skeleton is also a storehouse for two minerals, calcium and phosphorus, that are essential for the functioning of other body systems, and this storehouse must be called upon in times of need.

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The bones of the skeletal system have about 700 muscles that make up half of a persons weight. The muscles are each a seperate organ made out of muscle tissue, blood vessels,tendons and nerves. Muscle tissue is also found inside the heart,digestive organs amd blood vessels.

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The primary organs are lungs which carry out the exchange of gases as we breathe.

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The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body

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This system gives the brain signals of what to do and what not to do. For example it you try to bite you finger off(which is as easy as biting a carrot), the brain tells your jaw to bite gently and not to really try to bite it off.

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And as we grow older, the brain loses a gram each year.

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Muscles make up more than 40% of your body weight and the smallest muscles that can be found are in the middle of your ear.

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Over Half of your body's bones are in your hands and feet.

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There are more neurons in your brain than stars in Milky Way

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There are more neurons in your brain than stars in Milky Way

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In humans, the right side of the brain controls the left side of your body and the left side of the brain controls the right side of your body.

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Every month you have a whole new layer of skin and your nails grow .5mm every week.