A proposed phylogenetic relationship between sea cucumber polian vesicles and the vertebrate lymphoreticular system.
D000818:Animals; D004447:Echinodermata / Q000276:immunology*; D008208:Lymphatic System / Q000502:physiology; D012157:Mononuclear Phagocyte System / Q000502:physiology; D010802:Phylogeny; D012616:Sea Cucumbers / Q000033:anatomy & histology / Q000276:immunology*