Community | The Alamo |
Subject:
Posted By:  Anonymous 0 Replies
Posted:  4/29/2017 12:32 AM
   How to lower blood pressure   The heart beat (contraction) begins when an electrical impulse from the sinoatrial node (also called the SA node or sinus node) moves through it.

  Reply to this Message:
Title: (optional)
Please enter
verification code:
  

    

The Alamo
Nenad Mirkovich

Not logged in. log in now...
© 2012 fine-art.com. Terms of Use.