Mucous

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Mucous

Mucous (pronunciation: /ˈmjuːkəs/) is a type of viscous, typically clear secretion produced by the mucous membranes of the body. It serves to protect and lubricate surfaces in the body, such as the respiratory and digestive tracts.

Etymology

The term "mucous" is derived from the Latin word "mucus," which means "slime, mold, snot, etc." It has been used in English since the late 14th century.

Function

Mucous membranes produce mucous to trap foreign particles like dust, bacteria, and viruses, preventing them from entering the body. In the respiratory tract, the cilia, tiny hair-like structures, move the mucous and trapped particles out of the body or to the stomach to be destroyed by stomach acids.

Related Terms

  • Mucus: Mucus is the term used for mucous when it is found outside the body. It is the same substance as mucous but is used in a different context.
  • Mucous Membrane: This is a type of epithelial tissue that secretes mucous and that lines many body cavities and tubular organs including the gut and respiratory passages.
  • Mucin: Mucins are a family of high molecular weight, heavily glycosylated proteins produced by epithelial tissues in most animals. They are a key component of mucous.
  • Phlegm: Phlegm is a type of mucous produced in the lungs and lower respiratory tract. It is often a symptom of illness.
  • Sputum: Sputum is mucous that is coughed up from the lower airways.

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