1. From Cells to Organisms multicellular unicellular organism From Cells to Organisms tissue organ organ systems

2. How are living thins organized? How are living things organized? unicellular (ū΄nə sel΄ū lər) Made up of only one cell. multicellular (mul΄tē sel΄ū lər) Made up of more than one cell. unicellular multicellular organism organism (ôr´gə niz´əm) An individual living thing.

3. tissuecellorgan system organism c How do cells work together? tissue (tish΄ü) A group of similar cells that work together to do the same job. organ ( ôr ΄gə n) A group of tissues that work together to perform a specific bodily function. tissue organ organ system organ system ( ôr ΄gə n sis΄təm) A group of organs that work together to perform a specific bodily function.

4. What are some plant and animal organ systems? root system skeletal system

5. Review Main Idea How are multicellular organisms organized? Multicellular organisms have different levels of organization. Cells that work at the same job group into tissues. Tissues work together as organs to carry out a specific bodily function. Organs work together in organ systems to carry out an organism’s life processes.

6. Review Multicellular organisms are made up of cells, tissues, organs, and organ systems. Main Idea What are multicellular organisms made up of?

7. Revie w Compare and Contrast A diatom carries out its life processes in one cell. A frog carries out its life processes in many different cells. They are both living organisms. Different Alike How are a diatom and a frog alike? How are they different?

8. Review unicellularorganism A) B) an individual living thing a group of similar cells that work together to do the same job C) made up of more than one cell multicellular D) a group of tissues that work together to perform a specific bodily function E) made up of only one cell tissue organ Vocabulary Match each word with its definition. organ system F) a group of organs that work together to perform a specific bodily function

9. Review Reading Charts What is respiration?