(Science: anatomy, surgery) a small sac-like structure that sometimes forms in the walls of the intestines, diverticula can trap particles of food (especially small seeds and undigested grains) and become very inflammed and painful (this condition is called diverticulitis).
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bursa Fabricius.. What's that? It is a dorsal diverticulum of bird's cloaca, the origin of B-cells in addition to that ones produced in bone marrow in where B-cells undergo proliferation, education, and differentiation. http://www.uic.edu/classes/dh/dh110/Immunology_files/slide0187_image026.gif ...
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