Cell biology is a branch of biology that studies the structure, function, and processes of cells, which are the basic building blocks of all living organisms. It focuses on the study of cell components, such as cell membrane, nucleus, cytoplasm, organelles, and their interactions within the cell and with other cells. Cell biologists investigate various cellular processes, including cell division, growth, metabolism, and communication. This field plays a vital role in understanding the inner workings of organisms, diseases, genetics, and developmental biology.