Surgeons are assisted by a skilled team-each one dedicated to their special role in your care. These professionals are part of a typical surgical team: The Anesthesiologist (MD) and Nurse Anesthetist (CRNA) review your medical information and discuss your options for anesthesia care.
A browser is software that is used to access the internet. A browser lets you visit websites and do activities within them like login, view multimedia, link from one site to another, visit one page from another, print, send and receive email, among many other activities.
A simple definition: A web service is a function that can be accessed by other programs over the web (Http). To clarify a bit, when you create a website in PHP that outputs HTML its target is the browser and by extension the human being reading the page in the browser. A web service is not targeted at humans but rather at other programs.