1. Week 9 Vocabulary Homeostasis Microscope Cell Theory
Process by which an organism’s internal environment is kept stable in spite of changes in external environment
Microscope
An instrument that makes small objects look larger
Cell Theory
A widely accepted explanation of the relationship between cells and living things

2. Week 9 Vocabulary Cell Organelle
The basic unit of structure and function in living things
Organelle
A tiny cell structure that carries out a specific function within the cell

3. Week 9 Vocabulary Unicellular Multicellular
Having or consisting of a single cell
Multicellular
Having or consisting of 2 or more cells

4. Week 9 Vocabulary Tissue Organ Organ System
A group of similar cells that perform the same function
Organ
Structure composed of different kinds of tissue
Organ System
A group of organs that work together to perform a major function