Your mouth, nose, throat, sinuses and lungs are lined with mucus membranes. These membranes contain mucus glands that produce - surprise - mucus. Mucus-producing membranes line specific passages in your body, like the respiratory and digestive tracts, for protection and support.
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In economics, Gross Domestic Product is used to calculate the total value of the goods and services produced within a country's borders, while Gross National Product is used to calculate the total value of the goods and services produced by the residents of a country, no matter their location.
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