Components of the Lymphoid System

Primary And Secondary Lymphoid Nodules

Located in lamina propria of any organ system opening to the exterior of the body, such as respiratory and digestive systems, where an antigen could penetrate the epithelium and enter the lamina propria. Diffuse lymphoid tissue in the lamina propria is part of the mucosal-associated lymphoid tissue MALT . Diffuse lymphatic tissue is also located in tonsils, lymph nodes, and spleen. Composed of an unorganized cluster of lymphocytes and other cells capable of responding to an antigen that...

Components

Stomach Rugae

Organs comprising the tubular digestive tract. figure 12.1. Organs comprising the tubular digestive tract. Stomach Small intestine Large intestine Basic Histological Organization Layers Mucosa mucous membrane . Innermost layer facing the lumen Epithelium. Either a stratified squamous moist or a simple columnar epithelium Lamina propria. Loose connective tissue usually possesses digestive glands Muscularis mucosae of smooth muscle is usually present. Submucosa. Denser connective...