The Cell What do you know already about cells? Most cells can be seen with the naked eye All living things are made of cells. Plant cells and animal cells are the same. Humans are made up of trillions of cells. New cells come from cells that were already there. An organism gets bigger because its cells get bigger. What is a cell? A cell is the smallest and most basic unit of life that can carry out life functions. Two types of cells The Cell Theory 1. All living things are made of one or more cells. 2. The cell is the basic unit of life. 3. All cells come from pre-existing cells. Stepping inside a cell…. Organelles We and other organisms are made of organs and tissues that are made of cells. Each cell, is made up of smaller parts – called organelles. An organelle is a structure within a cell that carries out specific functions to support the life of the cell. Animal Cells Plant Cells….. Did you see any differences between plant and animal cells?