1. Homeostasis
7.4

2. To maintain homeostasis:
Unicellular organisms – grow, respond, transform energy, reproduce

3. Multicellular organisms – have specialized cells for jobs and communication
Communicate with chemical signals, receptor proteins, cellular junctions

4. Levels of Organization
Cells  _______ 
(group of similar cells that performs a specific function)

5. Levels of Organization
Cells  _Tissue_ 
(group of similar cells that performs a specific function)

6. Levels of Organization
Cells  _Tissue_  _______
(Many groups of tissues work together)

7. Levels of Organization
Cells  _Tissue_  _Organ_ 
(Many groups of tissues work together)

8. Levels of Organization
Cells  _Tissue_  _Organ_  _______
(A group of organs that work together to perform a specific function)

9. Levels of Organization
Cells  _Tissue_  _Organ_  _Organ System_
(A group of organs that work together to perform a specific function)

10. Levels of Organization
Cells  _Tissue_  _Organ_  _Organ System  _________

11. Levels of Organization
Cells  _Tissue_  _Organ_  _Organ System  _Organism_