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The cardiovascular system and the respiratory system work together to supply oxygen to the body.

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1.Most people have 12 ribs but 1% of people have 13 ribs, this thirteenth rib is called the cervical rib
2.More than half of your bones are in your hands and feet together they are composed of 106 bones
3.Bones are designed to take a beating. Some bones are able to absorb two to three times your body weight in force 
4. You can eat your way to stronger bones. If you eat a calcium rich diet you can make your bones very strong.
5. Ancient Egyptians were the first people to successfully create the world's first prosthetic bone. It was made 3000 years ago and it was a prosthetic big toe.

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1. There are more than 30 facial muscles, which help us express emotions such as happiness, surprise, and sadness on the face.

2. Muscles take up over 40% of our total body weight

3. The ears contain the smallest muscles in the body

4. The muscular system consists of approximately 700 muscles that belong to one of three distinct categories: skeletal, smooth or cardiac

5. Your body is made up of approximately 696 muscles. Muscles can contract, pull, and relax, but they can’t push or stretch themselves.

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1) The average person produces 2 pints of saliva every day.

2) The gut-brain axis is the close bond that exists between the digestive system and the brain. Emotions like stress and brain disorders affect how your body digests food.

3) The small intestine is 22-23 feet long while the large intestine is 5 ft long.

4) Enzymes found in some laundry detergents to remove stains are the same as the ones found in your digestive system.

5) Your stomach can stretch to hold up to 4 pounds of food.

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1.Most people have 12 ribs but you can have 13 but its is very rare
2. 26 bones in a foot.
3. 106 bones in your hands and feet combined.
4. You can eat your way to stronger bones.
5. Your bones are made to take a beating.

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1. Most heart attacks happen on a Monday.
2. At rest the average heart rate pumps easily over 5 liters of blood throughout the body every minute.
3. The heart cells stop dividing, which means that cancer is extremely rare.
4. If you stretch you blood vessel system it would extend over 60,000 miles.
5. The heart continues beating even when it becomes disconnected from the body.

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1.There are two parts to the Nervous System
2. If we lined up all the neurons in our body it would be around 965 km long.
3.The left side of the brain controls the right side of the body and vice versa.
4.Males and Females have different brain compositions, men have more gray matter while women have more white matter
5., There is a group of neurons called mirror neurons and they are cause us to have some behaviors being contagious, such as yawning.

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1.

1. There are more than 30 facial muscles, which help us express emotions such as happiness, surprise, and sadness on the face.

2. Muscles take up over 40% of our total body weight

3. The ears contain the smallest muscles in the body

4. The muscular system consists of approximately 700 muscles that belong to one of three distinct categories: skeletal, smooth or cardiac

5. Your body is made up of approximately 696 muscles. Muscles can contract, pull, and relax, but they can’t push or stretch themselves.

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1. Each month, the body grows a new layer of skin

2. The average person sheds 40 lbs. Of skin per lifetime

3. Sweat glands can produce anywhere from 0.7 to 1.5 L of sweat per hour

4. A single strand of hair is one of the thinnest things in the world, ranging from as thin as 0.002mm to 0.006 mm.

5. When stretched out, the average adult has 20 sq. ft. of skin

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1. Lungs aren't the same size. To accommodate the heart, the right lung is larger than the left lung

2.  Lungs float on water

3.  Most people breathe through one nostril at a time

4. A person usually breathes an average of 13 pints of air every minute.

5.  Lungs and tennis courts can be the same size when lungs were opened flat

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explain why!