All living things are made up of a bunch of cells. What is pretty each, when it comes to humans, is that there are more bacterial cells in or on you than there you have actual human cells/ Each cell is made up of much smaller units that each perform a different job. These smaller parts are called organelles. Organelles can be thought of as organs of the cells they are in. Each organelle is vital to complete all the tasks for the cell itself.
Each cell is surrounded by a protective shield that is made from protein and lipids (fats) called the plasma membrane. This membrane decides what can go into and come out of the cell itself. There is a control center of the cell called a nucleus that has all the instructions for carrying out every activity within the cell. This is a small compact organelle called the mitochondria that helps the cell make usable energy from food. Everything in the cell is covered in a jelly-like substance called cytoplasm this helps things move around the cell. The body of the cell is held up by an organelle called endoplasmic reticulum and it allows things to be transported to neighboring cells. These worksheets will help you learn more about cell organelles.