A collection of articles written bye scholars and/or researches​

Scholarly or peer-reviewed journal articles.

Explanation:

Information can be defined as processed data that can be used to perform specific tasks or job functions. The two (2) main sources of information are;

I. Primary source: this type of source comprises of raw information that are first-hand in nature i.e a personal experience or witness of an event (occurrence).

II. Secondary source: this type of source relies solely on the primary source for its information and as such it comprises of second-hand information provided by other authors or researchers.

For research purposes, it is very important and essential to get a scholarly or peer-reviewed journal article because it contains information on original research and other highly valuable sources.

Thus, scholarly or peer-reviewed journal articles is a collection of articles written by scholars and/or researchers. They are generally a lengthy literary work written by experts or professionals, for other experts and as such communicates new discoveries and knowledge to a scholarly group (readers).

b) the heart is a pump made of muscle and that is difficult to grow in the lab.