1. Cells are the fundamental building blocks of all living organisms. Everything from a single-celled bacterium to a complex human being is made up of cells.
2. Cells carry out all the basic functions necessary for life. This includes processes like metabolism, growth, reproduction, and response to stimuli. Each cell is a miniature factory, performing all the essential tasks to keep itself and the organism alive.
3. The structure and function of cells determine the characteristics of the organism. Different types of cells have different structures and functions, which lead to the diversity of life forms we see. For example, muscle cells are specialized for movement, while nerve cells are specialized for communication.
