Limaskestasid

Limaskestasid are moist tissue linings that line many body cavities and passages which communicate with the exterior. They cover the inner surfaces of the mouth, nose, throat, lungs, stomach, intestines, urinary tract, reproductive tract, and the surface of the eye, among others. Their primary roles are protection, lubrication, and participation in immune defense.

The structure of limaskestasid consists of an epithelial layer resting on a lamina propria of connective tissue, and in some regions a muscularis mucosae. The type of epithelium varies by location: stratified squamous epithelium in regions subject to abrasion (such as the oral and vaginal mucosa), and columnar or pseudostratified epithelium with goblet cells in many parts of the respiratory and digestive tracts. Goblet cells and glands produce mucus that keeps surfaces moist and traps microbes; cilia in the respiratory tract help move mucus out of the airways.

Limaskestasid play a crucial role in barrier function and immune defense. They maintain hydration, support a local microbiota, and contribute to immune protection through secretory antibodies and mucosa-associated lymphoid tissue (MALT). The mucus and epithelial surfaces work together to prevent pathogen entry and coordinate responses to invaders.

Disorders affecting limaskestasid include inflammation (such as rhinitis or conjunctivitis), dryness or irritation (xerostomia or dry eye), ulcers, infections, and autoimmune conditions that reduce mucosal secretions or damage mucosal integrity. While generally robust, limaskestasid can be compromised by dehydration, injury, or systemic diseases, underscoring their importance to overall health.