Translations:Benutzer:Arian/Klett-Mini-Test/386/en

The polarity of the head system and the metabolic-limb system finds its equilibration in the organ system that inserts itself between them: the two rhythmically breathing lung-lobes, the rhythmically pulsating heart, and the diaphragm. In its movements the latter follows the breathing rhythm passively — but can also support it through its own active engagement. Morphologically, the rhythmic middle expresses itself in the succession of the ribs, which close off the thorax upward toward the head, while opening and widening it downward toward the abdominal cavity spanned by the diaphragm. Physiologically, the blood streams from and to the heart through the whole body and