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The types of membranes lining cavities that communicate with the exterior of the body are mucous membranes. These membranes are found in areas such as the respiratory, digestive, urinary, and reproductive tracts, and they secrete mucus to protect and lubricate the tissues.
Mucous membranes
The lining of the mouth is an example of a mucous membrane. Mucous membranes line various cavities in the body and produce mucus to protect and lubricate the underlying tissues.
believe it or not, mucous membranes secrete mucous. It helps protect the respiratory system (or whichever system the mucous membrane you're referring to is in).
The skin mucous membrane is a protective barrier that lines the cavities and openings of the body exposed to the external environment, such as the mouth, nose, and genital area. It secretes mucous to help trap and remove pathogens, and plays a role in preventing infections.
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Goblet cells in mucous membranes secrete a water-based protein solution called mucin. This solution helps to lubricate and protect the mucous membranes lining various body surfaces, such as the respiratory and digestive tracts.
Goblet cells are the cells in both simple columnar and pseudostratified columnar epithelia that produce protective mucous coatings over mucous membranes. These cells secrete mucus, which helps to lubricate and protect the surface of the tissues from damage, dehydration, and invasion by pathogens.
The mouth absorbs water, electrolytes, and some medications through the mucous membranes in the lining of the mouth. These substances can enter the bloodstream directly through these membranes.
The stomach lining is protected from the very strong acid of the stomach by a coat of mucus. It is secreted by mucous membranes.
The least protective body cavity is the nasal cavity, as it is lined with delicate mucous membranes that can be easily damaged.
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