Tissue is a term that is used as an adjective, it serves to refer to everything related to the tissues of a certain organism. The most appropriate field to refer to this term is the scientific one, which from the point of view of the composition of the organisms to the clinical study is used. A tissue composition is that set of cells that can form a tissue of all possible levels.
Basically tissues such as those of animals constitute two types of levels, the first of them is the simple tissue level, which is when cells come from a function that has always been the same and is only one, in studies we find different forms of cellular tissues, such as the cells that pigment the skin, nails, hair. Its composition is basic and its study is to determine any anomaly present in its formation.
The second level is to describe that set of cells that despite being different share a single objective, having different compositions. It is called the upper or composite tissue level because this tissue is made up of different cells, all with different origins capable of acting related to guarantee the function of an organ. An example of a higher tissue level is one that is present in the stomach, which is an organism of diverse composition, the most notable being the relationship between the cells that make up the stomach wall with those that serve to cover with a protective mucosa of acids to this.
