What is the name of the slimy fluid secreted by the mucous membranes?

Mucus is the slimy fluid produced by mucous membranes, which are the protective linings found in various body cavities and passages that open to the exterior. This viscous substance plays a crucial role in the body by serving several functions. It helps to trap pathogens, dust, and other foreign particles, protecting the underlying tissues from irritation and infection. Mucus also maintains moisture in the respiratory and gastrointestinal tracts, aiding in digestion and respiration.

In contrast, serous fluid is generally a clear, watery fluid that lubricates and reduces friction between organs, usually found in the serous membranes such as those lining the thoracic and abdominal cavities. Pus is an accumulation of dead white blood cells, bacteria, and tissue debris, typically resulting from infection, and is not secreted by mucous membranes. Saliva is the digestive fluid produced by salivary glands in the mouth, which helps in the initial process of digestion rather than the protective functions performed by mucus.

Understanding the specific roles and characteristics of these different fluids is essential in medical terminology and the overall functioning of the body's systems.