ournal Article is sometimes called a Scientific Article, a Peer-Reviewed Article, or a Scholarly Research Article. Together, journal articles in a particular field are often referred to as The Literature. Journal articles are most often Primary Research Articles. However, they can also be Review Articles. These types of articles have different aims and requirements. Sometimes, an article describes a new tool or method. Because articles in scientific journals are specific, meticulously cited and peer-reviewed, journal databases are the best place to look for information on previous research on your species. Without a background in the field, journal articles may be hard to understand - however, you do not need to understand an entire article to be able to get valuable information from it. Tissue transplantation is the transfer of essential tissue from one location to another with in the same individual or from one person to the other for the purpose of replacing patients damaged tissue or sometimes absent tissue. Many diseases which will not be readily curable by any existing therapies can be cured by this method of this tissue transplantation technique. There are different types of tissue transplantations and the most commonly transplanted tissues include cornea, skin, heart valves, nerves and veins.