This website from North Caroline State University displays the common structure of scholarly journal articles. They might use different headings to describe the sections of the article, but once you learn the purpose for each section you'll begin to recognize that common anatomy.
Anatomy of a Scholarly Article
Be aware of these common features so you know you are reading the kind of scholarly research your professors expect!
When in doubt about an article (Is it scholarly? Is it peer-reviewed?) use Ullrichsweb.com to find out more about the journal.