Talk:Draft 2016

Diffuse Lymphatic Tissue

Diffuse Lymphatic Tissue Locations

Alimentary canal, respiratory passage and urogenital tract. BALT - Bronchus Associated Lymphoid Tissue or GALT - Gut Associated Lymphatic Tissue Not enclosed by a connective tissue capsule Located in subepithelial tissue - lamina propria Diffuse lymphatic tissue + nodules Reactive - enlarge when activated (by antigen) Lymphocytes travel to nodes and back again proliferation and differentiation Gastrointestinal Tract Oropharynx - Tonsils Distal small intestine (ilieum) - Peyer’s Patches Appendix, cecum

Tonsil and MALT

Mucosal Associated Lymphoid Tissues
Anatomical location - Palatine (tonsils), Lingual and Pharyngeal ( adenoids ) Ring of oral adenoid tissue: anterior - lingual tonsil formed by the submucous adenoid collections. lateral - palatine tonsils and adenoid collections near the auditory tubes. posterior - pharyngeal tonsil on the posterior wall of the pharynx. between main masses are smaller collections of adenoid tissue.

Tonsils
Palatine Tonsils the "tonsils", lateral wall of oropharynx covered by stratified squamous epithelium numerous crypts (10-20) infolds of surface epithelium Afferent lymph vessels absent Efferent lymph vessels are present
Lingual Tonsils lamina propria root of tongue covered by stratified squamous epithelium salivary glands and skeletal muscle are directly adjacent	Pharyngeal Tonsils adenoids or nasopharyngeal tonsils, upper posterior part of throat covered by a pseudostratified ciliated epithelium with goblet cells

Peyer's Patch

Located in the ileum Peyers patches (ileocolonoscopy) Peyer's Patch (histology) microfold cells or M-cells (transport gut lumen organisms and particles to immune cells across the epithelial barrier). About Peyer's Patch External Links Notice - The dynamic nature of the internet may mean that some of these listed links may no longer function. If the link no longer works search the web with the link text or name. Links to any external commercial sites are provided for information purposes only and should never be considered an endorsement. UNSW Embryology is provided as an educational resource with no clinical information or commercial affiliation. Learn how the Peyer's Patches function in the Gut Mucosa immune function in this Nature Immunology Animation - Immunology in the Gut Mucosa Peyer's Patches are named after Johann Conrad Peyer (1653 – 1712) a Swiss anatomist who first described these specialised structures.