Any of the rounded masses of lymphoid tissue that are surrounded by a capsule of connective tissue, are distributed along the lymphatic vessels, and contain numerous lymphocytes which filter the flow of lymph.
Comment:
[homology-note] "Lymph nodes that are associated with the lymphatic system have evolved in mammals.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0001273", ontology="VHOG", source="ISBN:978-0030223693 Liem KF, Bemis WE, Walker WF, Grande L, Functional Anatomy of the Vertebrates: An Evolutionary Perspective (2001) p.630", source="http://bgee.unil.ch/"}