Page 227 - The Miracle of the Blood and Heart
P. 227

Blood Vessels: A Flawless
                                   Transportation Network


                 and capillaries. The veins carry so much blood, as stated ear-
                 lier, thanks to their blood-storage duty.
                    The level of blood in the capillaries, on the other hand, is
                 rather low compared to their work. There is a constantly con-
                 trolled flow of materials to these fine blood vessels.
                    When the body begins to lose blood, and when blood pres-
                 sure begins to fall, pressure reflexes arise in various parts of


                                               Veins are able to carry three times
                                               more blood than do the arteries and
                                               capillaries, thanks to their special
                                               structure.


                          Jugular vein
                    Carotid artery                   Subclavian artery
                                                      Subclavian vein
                Superior vena cava                  Pulmonary artery
                 Pulmonary vein
                    Inferior vena
                          cava                     Aorta
                                                     Mesenteric vein
                   Renal vein
                                                     Mesenteric artery
                   Renal artery
                            Common            Common
                            iliac             iliac vein
                            artery

                    Femoral artery               Femoral vein

                                                 Great saphenous
                                                 vein











                                                                       Adnan
                                                                       Oktar



                                             225
   222   223   224   225   226   227   228   229   230   231   232