Although they are not a site of lymphocyte formation,_________ lymphatic structures provide sites where immune responses are initiated.2-21-2013

Question

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Secondary lymphatic structures provide sites where immune responses are initiated, as they contain lymphocytes and other immune cells that respond to foreign antigens. Primary lymphatic structures, such as the thymus and bone marrow, are sites of lymphocyte formation. Hemopoietic and red marrow are types of tissues found in bone marrow that produce blood cells, but are not directly involved in immune responses.

Although They Are Not a Site of Lymphocyte Formation,_________ Lymphatic