Page 82 - For Men of Understanding
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veins
                   superior
                   vena
                   cava                               aorta
             right
             pulmonary
             artery                                   pulmonary
                                                      vein body
         right
         pulmonary                                    left pulmonary
         vein                                         vein
         right atrium                                 left atrium
                                                      semilunar valve
          semilunar valve
                                                      atrioventricular
         atrioventricular                             valve
         valve
                                                      left ventricle
         right ventricle
                                                      septum      The heart has an excellent design based on
                                                                  delicate balances, with its four chambers
                  inferior
                  vena                                            pumping blood to different parts of the body
                  cava                                            without mixing two different kinds of bloods one
                                                                  with another, and its openings functioning as
                                              apex                safety valves.



                        minute. It rests only for half a second between each beat and it beats approx-
                        imately 100,000 times a day. When a human’s life span is considered, we would
                        come across a figure quite hard to calculate.
                           All the structures in the heart, which has an extremely delicate order in its
                        operation, are specially designed. In the heart, every detail has been consid-
                        ered: the deoxygenated and oxygenated blood’s not mixing with one another,
                        the regulation of body pressure, the operations required for the delivery of
                        nutrients to the whole body, and the systems that pump blood only as much
                        as needed. The heart is accordingly designed for all of the above.
                           In the heart, which is a wonder of design, exists a system so complex that
                        it could not by any means have been formed by coincidence. All of these fea-
                        tures present us their designer, that is, Allah, the Sustainer of all the worlds,
                        Who creates flawlessly and without an example.

                           A few features of the heart can be listed:
                           The heart is placed in one of the most protected places in the body:
                        By being placed in the rib-cage with a special design, the heart, one of the most
                        important organs, is very well protected against external blows.
                           Deoxygenated and oxygenated bloods never mix: In the heart, deoxy-
                        genated and oxygenated bloods are in constant motion. A special tissue divides
                        the heart into four chambers with different features. The upper part comprises
                        the right and the left atria, which are filling chambers. They pass the blood to
                        the ventricles below. Thanks to the delicate order here, the bloods never mix
                        with each other.
                           It regulates the blood pressure in such a way that it does no harm to
                        the organs: The heart works not like a single pump, but like two adjacent


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