The Respiratory And Circulatory Systems - English Microscope Slides are microscope slides from 3B Scientific and manufactured in Germany. 10 Microscope Slides.1(d). Trachea, cat, t.s.2(e). Lung, human t.s.3(c). Blood, human, Wright stained smear4(c). Artery, human, t.s., elastica stained5(e). Vein, human, t.s., elastica stained6(e). Artery and vein, human, t.s., elastica stained7(e). Aorta, human, t.s.8(e). Heart muscle, human t.s. and l.s. intercalated discs9(e). Lymph gland, human, t.s.10(e). Red bone marrow, human rib, t.s. Giemsa stained. The slides are best used for student education on the respiratory and circulatory systems.