Dreams that involve hair loss or the loss of teeth, false teeth, etc, are normally a sign that you're worried about either aging, or - more frequently - the passage of time, that life is passing you by in some way.<br /> <br /> I don't think you can analyse dreams precisely.
SA node. the main pacemaker that initiates each heart beat located at the junction of the superior vena cava and the right atrium the SA node generates electrical impulses at 60 to 100 times per minute and is controlled by the sympathetic and parasympathetic nervous system.
The events between the start of one hearbeat and the start of the next is called the. The sinoatrial node acts as the pacemaker of the heart because these cells are. After the SA node is depolarized and the impulse spreads through the atria, there is a slight delay before the impulse spreads to the ventricles.