lamina propria

lamina propria mucosa

A thin layer of loose connective tissue which lies beneath the epithelium and together with the epithelium constitutes the mucosa[WP]. The lamina propria contains capillaries and a central lacteal (lymph vessel) in the small intestine, as well as lymphoid tissue. Lamina propria also contains glands with the ducts opening on to the mucosal epithelium, that secrete mucus and serous secretions.

Type Vessel
Parent Structure organ component layer
Latin Name lamina propria mucosa
FMA ID 62517

Sub-structures

gallbladder lamina propria Organ gastrointestinal system lamina propria Organ lamina propria of esophagus Organ lamina propria of ureter Organ lamina propria of urethra Organ lamina propria of urinary bladder Organ lamina propria of vagina Organ oral lamina propria Organ respiratory system lamina propria Organ

Frequently Asked Questions

What is the lamina propria and where is it found?
The lamina propria is a thin layer of loose connective tissue lying directly beneath the epithelium of mucous membranes throughout the body, including the gastrointestinal tract, respiratory system, and urogenital tract. Together with the overlying epithelium, it forms the mucosa.
What structures are found within the lamina propria?
The lamina propria contains blood capillaries and lymphatic vessels (including central lacteals in intestinal villi that absorb dietary fat), lymphoid aggregates and immune cells (T cells, B cells, plasma cells, macrophages, dendritic cells), and in some regions, glands and smooth muscle fibers.
What is the immunological role of the lamina propria?
The lamina propria is a major site of mucosal immunity. It contains large numbers of immunoglobulin A (IgA)-secreting plasma cells, regulatory T cells, and innate immune cells that maintain tolerance to commensal microbiota while defending against pathogens at mucosal surfaces.

Related Structures

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Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.