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

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

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

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