The 2 types of cells that exist and their characteristics

In our body there are millions of cells, all composed of different sizes and shapes, although most of them are imperceptible to the human eye. According to the RAE, cells are «a fundamental unit of living organisms, generally microscopic in size, capable of of independent reproduction and formed by a cytoplasm and a nucleus surrounded by a membrane ». Ultimately, it is our biological organization, according to science, the smallest living structure that exists in the universe. Characteristics of cells Cells are all different from each other. They can change in shape and size remarkably, with their average size being 10 micrometers, and most of them are not normally perceptible to the human eye and must be seen through a microscope. Others, larger in size and shape, can be seen by man without the need for any type of apparatus.All these cells fulfill similar functions of relationship, nutrition and reproduction, even, in many cases, they are living organisms that can be unicellular or multicellular, and they all contain genetic material in the form of DNA, gene material, and RNA. They are sustained by an active metabolism thanks to their enzymes, biomolecules and other proteins.The functional characteristics that allow us to differentiate cells from non-living systems are several: Nutrition Multiplication Signaling Difference Evolution Types There are two large groups of cells that make up, according to their structure, any living system Prokaryotic cells are the most primitive as well as the simplest that exist. Its nucleus is not usually very differentiated from what is the rest of the structure and its genetic material is free in the cytoplasm.The normal thing is that this type of cells are unicellular. Within this classification, many experts divide them into two: archaea and bacteria, while eukaryotes are much more complex than the previous ones and much more evolved in their form. Its nucleus is well differentiated from the rest of the body and its relationship with organs and tissues has the ability to create multicellular beings. In this nucleus is where the genetic material that we all have is kept. Within this group we find fungi, plants and animals. The study of cells has been very important throughout history since the first microscopes were developed during the sixteenth century. This technological advance has served to understand little by little, the behavior of cells in organisms.