1. Biological Organization in Animals

2. Hierarchy
In order to perform the tasks necessary for life (breathing, eating, moving, reproducing) animals must organize their cells in levels of increasing complexity called a hierarchy

3. 1. Cell
The basic unit of structure and function of living things

4. 2. Tissue
Specialized cells working together to perform a function

5. 3. Organ
Different tissues working together to perform a specific task

6. 4. Organ System
A group of organs that interact with each other to perform a common task

7. 5. Organism
A body made up of tissues, organs, and organ systems, that work together to carry on the various tasks necessary for life

9. Your turn
Read pp. 68 → 69 in your textbook, then answer Q# 3 and 4 on pg. 69
Read pp. 70 → 71 in your textbook, then answer Q# 1 → 3 on pg. 71