Overview: Ask questions to get the students thinking. How tall do you think I am in cells? Answer: several hundred thousand. What is a cell? Answer: A cell is the basic unit of all living things. How does a cell make its energy? Answer: A cell makes energy in the mitochondria, which is the 'powerhouse' of the cell. Why do we need to learn about cells? (lead into next topic) So who cares? Why should you care about cells? Explain why: Everyone is made up of cells; they are the main building block of all life. There are many ways to use this knowledge, such as: If you want to become a doctor or scientist If you want to help people and find cures for diseases Let them look at slides of cells. Facts about cells: cell functions self maintenance synthesis of cell products cell division movement (flagella, cilia) Cells take in nutrients and excrete waste products. All functions require energy. Main organelles: plasma membrane cytoskeleton nucleus ER and ribosomes Golgi apparatus lysosomes vacuoles flagella Systems: power system - mitochondria control center - nucleus movement system - flagella creates energy - ribosomes entrance system - plasma membrane storage area - vacuoles preparation system - lysosomes Review the material. brief conclusion / summary of what they learned ask the same "mind-jogging" questions from the introduction introduce the cell activities (see Name Game and Construction Paper Cells)