Cell biology is not so much a discipline as it is a field. This can be understood in two ways: First, the nature of its core problem—the combination of development and inheritance at the cellular level—is not limited to the scope of a discipline. Second, it has intersected with many disciplines, and even the boundaries are difficult to distinguish. For example, in terms of research materials, single-cell protozoa are both the simplest animals and the most complex cells because they combine many functions; especially the ciliates, not only for studying certain problems, such as cilia and The movement of flagella is particularly advantageous, and research on development and inheritance has accumulated a wealth of valuable information. But such research can also be included in the scope of protozoology. Secondly, in terms of research questions, immunity is one of the important functions of cells. Cellular immunity should belong to the category of cell biology, but this is also the basic problem of immunology.
Due to the wide range of disciplines, cell biology, although broad in scope, cannot be subdivided into sub-disciplines like some disciplines—such as cytology, which is divided into cell morphology and cytochemistry based on the angle from which cells are studied. If you want to properly divide its content, you can first divide it into two aspects: First, study the structure and function of various components of cells (according to specific research objects), which should be the basis for further research, and put them Listed, for example, genome and gene expression, chromatin and chromosomes, various organelles, cell surface membranes and membrane systems, cytoskeleton, extracellular matrix, and the like. Secondly, according to which life activities of the cells are divided, such as cell division, growth, exercise, excitability, differentiation, aging and pathology, the changes of cells in these processes, the mechanisms of these processes are generated.