organ measurement lymphatic system measurement lymph node measurement 2013-05-08T15:21:27Z A value resulting from the quantification of a morphological or physiological parameter of one or more lymph nodes, any of the accumulations of lymphoid tissue organized as definite lymphoid organs along the course of lymphatic vessels, consisting of an outer cortical and an inner medullary part; they are the main source of lymphocytes of the peripheral blood and, as part of the reticuloendothelial system, serve as a defense mechanism by removing noxious agents, e.g., bacteria and toxins, and probably play a role in antibody formation. CMO:0001581 JSmith clinical_measurement_ontology