Mots Croisés Circulation Version en ligne Complete the crossword of the circulation par Emilia Poleth 1 Thin outer membrane covering the heart 2 Tiny caliber vessels that connect the veins to the arteries 3 Ducts with strong and elastic walls 4 Organs that ensure blood circulation in one direction 5 Blood-boosting organ 6 Lead the blood to the heart and reach the atria 2 4 6 5 3 1