HeartHeart 1 GIFHeart 1 TIFFHeart 2 GIFHeart 2 TIFFHeart 3 GIFHeart 3 TIFFHeart 4 GIFHeart 4 TIFFHeart 5 GIFHeart 5 TIFFVeinsVeins GIFVeins TIFFLeg VeinsLeg Veins GIFLeg Veins TIFFVein Cross SectionVein X Section GIFVein X Section TIFFArteriesArteries GIFArteries TIFFLeg ArteriesLeg Arteries GIFLeg Arteries TIFFArtery Cross SectionArtery X Section GIFArtery X Section TIFFArtery Cross SectionArtery GIFArtery TIFF CirculationCirculation GIFCirculation TIFFCapillariesCapillary X Section GIFCapillary X Section TIFFCapillary GIFCapillary TIFFVessels Cross SectionVessels X Section GIFVessels X Section TIFFVessel ValvesVessel Valves GIFVessel Valves TIFF Blood CellsBlood Cells 1 GIFBlood Cells 1 TIFFBlood Cells 2 GIFBlood Cells 2 TIFF