Cell biology is the study of cell structure and function, and it revolves around the concept that the cell is the fundamental unit of life. All living things, including humans, animals, and plants, are made of cells. Focusing on the cell permits a detailed understanding of the tissues, organs, organ systems, and organisms that cells compose. Cell biologists seek to understand how cells work by examining the machinery inside of them, investigating how they communicate and determining how they form larger structures.

Cell biology can be divided into many subtopics, including the study of cell metabolism, cell communication, cell cycle, and cell composition.
Research in cell biology is interconnected to other fields such as genetics, biochemistry, neurobiology, plant biology, molecular biology, microbiology, and immunology. Research on cells can lead to enhanced diagnoses, treatments, and cures of diseases.

Careers for cell biologists include: research scientist; staff scientist; imaging specialist; researcher in biotechnology, medical technology, or pharmacology; teaching at the advanced high school , collegiate, or university level; science communications; science policy; and science diplomacy.