They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. In most humans, the concentration of pacemaker cells in the sinoatrial (SA) node is the natural pacemaker, and the resultant rhythm is a sinus rhythm. Sometimes an ectopic pacemaker sets the pace, if the SA node is damaged or if the electrical conduction system of the heart has problems.
Use IE Tab for Chrome. The best way to use Java (or Silverlight, or other NPAPI-based technologies) going forward is to use IE Tab for Chrome. You can set up Auto URLs to automatically open certain urls using IE Tab, providing a seamless experience, as if Java support never went away. Get it here:
After years as the top mobile Web browser, Opera has fallen to Android's built-in Web browser. StatCounter's mobile Web browser numbers show Android's native browser taking first place from Opera. On the PC, Internet Explorer (IE), while declining for years, is still the top Web browser. On mobile devices, though, IE has never mattered, and Opera has long been the top dog. But, that's no longer the case.