lymphatic system morphology trait 2010-05-17T04:31:50Z Any measurable or observable characteristic related to the shape, structure, color, or pattern of the system of lymphoid channels and tissues that drains extracellular fluid from the periphery via the thoracic duct to the blood. Trait.ontology VT:0010071 caripark lymphoid system morphology trait hemolymphoid system morphology trait circulatory system morphology trait