Herzschlag

The pulse is a regularly repeating pressure wave produced by expelling blood from the heart to the body. The sequence of these pulses corresponds with the heart rate. The pulse can be felt and measured on the larger arteries situated close to the body surface (on the wrist, the neck and the groin). Expulsion of the blood from the heart is achieved by the contraction of the heart atriums and ventricles. The heart does not contract as a whole at the same time, but gradually. First the blood flows into the relaxed atriums. Then the atriums contract and expel blood to the chambers. Next the chambers contract and blood is driven to the arteries, the heart muscle relaxes and the whole cycle starts again. The heart contracts due to electrical signals ??“ excitations originating directly in the heart. To a certain extent it is therefore an autonomous organ independent of control by the brain.