Sinoatrial node. The sinoatrial node (SAN; also known as sinus node) is a group of cells located in the wall of the right atrium of the heart.
How Do Web Browsers Work? The World Wide Web is a system of Internet servers that support specially formatted documents. Web browsers are used to make it easy to access the World Wide Web. Browsers are able to display Web pages largely in part to an underlying Web protocol called HyperText Transfer Protocol (HTTP).
Quick Answer. A Web browser is a program used to visit websites, while a search engine is a website that allows you to look for specific websites or information based on keywords, dates and other criteria. Common examples of Web browsers include Internet Explorer, Safari, Firefox and Chrome. Common examples of search engines include Google, Yahoo!, Bing and Ask.