A cell is a basic unit of life. All living things are made up of cells. Cells are the smallest unit of life that can perform all the functions of life.Cells are very important because they are the building blocks of life. All plants and animals are made up of cells. Without cells, there would be no life.Cells are very small. They are so small that they can only be seen with a microscope. There are two types of cells, prokaryotic and eukaryotic.Prokaryotic cells are the simplest type of cell. They do not have a nucleus or any other organelles. Eukaryotic cells are more complex. They have a nucleus and other organelles.Cells carry out many functions. They can produce energy, remove waste, and help the body to fight disease.Cells are the basic unit of life and are necessary for the existence of all living things.