Lymphatic tissue is found in five different locations in the body; 1) the lamina propria of mucous membranes (walls of alimentary canal, upper respiratory passages and urinary tract) 2) lymph nodes; 3) spleen; 4) bone marrow; and 5) the thymus. In most cases lymphoid tissue consists of stroma and parenchyma. The stroma is formed of a network of reticular fibers to support the parenchymal cells and the walls of sinuses. The cells of the parenchyma include lymphocytes at various stages of development, reticular cells, macrophages, and plasma cells. [Note that the structure of the bone marrow will be covered in hematopoiesis.]

L y m p h o i d		2
	Slide Text Lymphatic tissue is found in five different locations in the body; 1) the lamina propria of mucous membranes (walls of alimentary canal, upper respiratory passages and urinary tract) 2) lymph nodes; 3) spleen; 4) bone marrow; and 5) the thymus. In most cases lymphoid tissue consists of stroma and parenchyma. The stroma is formed of a network of reticular fibers to support the parenchymal cells and the walls of sinuses. The cells of the parenchyma include lymphocytes at various stages of development, reticular cells, macrophages, and plasma cells. [Note that the structure of the bone marrow will be covered in hematopoiesis.]