The cell is the smallest unit of life. How does it work? This question and more will be answered in these guides about what a cell is and why they're so important to life. You'll learn what organelles make up cells and how they work together to create complex organisms along with the difference between plant cells and animal cells, eukaryotes and prokaryotes, and how cell processes regulate the cell. Fiveable's free guides will take you step by step to learn this crucial content for your biology class.