1. LO: SWBAT explain how the body is organized DN: What are cells? Explain the difference between a unicellular and a multicellular organism. HW: h/o cells r us Tuesday October 2, 2012

2. How is the body organized?

3. The body is highly organized. It allows the body to function as a fine- tuned machine! It always starts from a smaller structure, combining to create a larger structure.

4. 1. Organelle  Substructure of a cell  It performs a specific function  Found inside the cell

6. 2. Cell  Microscopic  Made up of organelles  All living things are made up of cells

8. 3. Tissue  A group of cells working together form a tissue.  Ex: Muscle cells working together form muscle tissue, skin cells working together form skin tissue.

10. 4. Organ  One or more tissues working together to perform a specific function.  Ex. stomach, skin, liver

11. kidneylungs

12. 5. Organ System  Two or more organs that work together to perform a specific process.  Ex. Stomach, small intestine, large intestine all work together to form the digestive system.

13. Digestive system

14. 6. Organism  When all organ systems work together and create a living thing  Ex. fungi, plants, animals

16. cells tissues organs organelles Organ systems organism

17. There are many different types of cells! They have a variety of sizes and shapes! Why is this?  Each type of cell carries out a different function  Ex. Muscle cells, nerve cells, sperm cells