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.
Lobo is an extensible all-Java web browser and RIA platform. It supports HTML 4, Javascript (AJAX) and CSS 2 plus direct JavaFX and Java (Swing/AWT) rendering. Cobra is the web browser's renderer API; also a Javascript-aware HTML parser.
If you are sure that you never use any websites that need Java, I do recommend that you remove or disable it. Chrome, Firefox, Internet Explorer, and most other Web browsers let you enable and disable Java at will in their Options settings. 1  In Chrome, enter chrome://plugins, then click Disable: link next to Java(TM).