The study of cell structure and function is known as cell biology, and it is based on the idea that the cell is the most basic unit of life. Concentrating on the cell allows for a more in-depth understanding of the tissues and organisms that cells make up. Some species have only one cell, whereas others have large cooperating groups of cells. Cell biology is concerned with the form and function of a cell, from the most basic traits shared by all cells to the unique, highly complex tasks exclusive to specialised cells. The 1830s could be regarded the beginning of this discipline. Despite the fact that scientists had been using microscopes for centuries, they didn't always know what they were looking at. Cell biology is divided into various subfields. The study of cell energy and the molecular systems that enable cell metabolism is one such example. As cells are machines in and of themselves, the study of cell energy intersects with the study of how energy initially formed billions of years ago in primordial cells.