3. The basic unit of life. Examples:  Blood cell  Nerve cell  Muscle cell

4. Group of cells working together. Examples:  Connective tissue  Epithelial tissue  Muscle tissue  Nerve tissue

5. Group of tissues working together. Examples:  Heart  Brain  Bicep

6. Group of organs working together. Examples:  Circulatory System  Nervous System  Muscular System

7. Any living thing made of a series of organ systems. Examples:  Mammals  Amphibians  Reptiles  Largest Organism video: http://www.youtube.com/watch?v=vW AA-SrrFUQ

8.  Video: http://www.youtube.com/watch?v=ZRFykdf4kDc http://www.youtube.com/watch?v=ZRFykdf4kDc  Video: http://www.youtube.com/watch?v=o1GQyciJaTAhttp://www.youtube.com/watch?v=o1GQyciJaTA  Video: Cells to Systems http://www.bbc.co.uk/bitesize/ks3/science/organisms_beha viour_health/cells_systems/activity/