abstract background biology blood blood cells body carbon dioxide cell count circulation concept corpuscle design disease erythrocyte fill graphic haemoglobin health hemoglobin illness iron macrocyte medicine megaloblast megalocyte microscopic New original oxygen platelets red red blood cells render science sickness style texture transfusion unique vector bulbs bunch flowers garden gift outside plant spring tulips autumn berries berry bush Cotoneaster England english fruit Great Britain nature shrub wall birthday bouqet bouquet of flowers bunch of flowers flower posy present rose roses architecture ball balls bauble baubles branch branches christmas Christmas tree Christmas Day Christmas Eve Christmas night christmas tree Christmastide christmastime decorated decoration decorative festive holiday home house noel outdoors red baubles tall tree winter woody plant xmas yard yule yuletide bevel gradient heart love marriage shape booth call communication phone phone booth street telephone alone isolated lone norway norwegian one roof single snow track trail windows glitter pattern pavement pebbles small stone stones wallpaper blue car circle limit sky speed sweden yellow