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The respiratory system is a group of organs and tissues, with a primary function of enabling you to breathe. The oxygen you inhale travels through the respiratory tract to your red blood cells.

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The main parts of the respiratory system are:
-Nasal Cavities
Large air-filled spaces behind the nose that moisten, warm and filter the air that comes through the nose
-Trachea
Also known as the windpipe, the trachea is the passageway for air to enter the lungs
-Lungs
The lungs are large sacs protected by your ribcage that fill with air when you breathe in

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Cystic fibrosis is an inherited disease that affects the cells that produce mucus, sweat, and digestive juices. These fluids are usually thin and slippery, but cystic fibrosis causes them to become thick and sticky. Instead of easily passing through tubes and acting as lubricants, the fluids block passageways that move through organs such as the lungs and pancreas.

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This disease is caused by a mutated gene that changes a protein that regulates the amount of salt in cells.  In order for children to develop cystic fibrosis, they need one copy of the defected gene from each parent. Cystic fibrosis is most common in people with European ancestry.

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The sticky mucus clogs the tubes that carry air in and out of your lungs. This can cause symptoms like:
-Breathlessness
-Wheezing
-Inflamed nasal passages
-Recurring lung infections
-Consistent mucus-filled coughs
-Higher salt level in salt
Symptoms like these can worsen or improve as time passes

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Cystic fibrosis isn't curable, but there are a number of ways to treat this disease.
- Diets high in calories, fat, and protein
The mucus lining the digestive tract makes it difficult for the body to absorb nutrients from food
-Vigorous physical therapy
This helps loosen and drain mucus accumulations in the lungs
-Bronchodilators
This inhaler-like tool relaxes the smooth muscles of the airway, which reduces constriction and makes it easier to breathe

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-Britannica
https://www.britannica.com/science/cystic-fibrosis
-Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/cystic-fibrosis/symptoms-causes/syc-20353700