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Arteries, Veins And Lymph Nodes In Human Body Anterior View. There Are Two Types Of Blood Vessels In The Circulatory System Of The Body: Arteries That Carry Oxygenated Blood From The Heart To Various Parts Of The Body And Veins That Carry Blood Towards The Heart For Purification. Lymph Nodes Erroneously Called Lymph Glands Are A Part Of The Lymphatic System, A Component Of The Body`s Immune System. Swollen Lymph Nodes May Signal An Infection. There Are Several Groups Of Lymph Nodes, Which Are Small, Bean-Shaped, Soft Nodules Of Tissue.