1. Figure 1.1 Levels of Structural Organization Process Diagrams Step-by-Step Copyright © 2007 by John Wiley & Sons, Inc.

2. 1CHEMICAL LEVEL Atoms (C, H, O, N, P) Molecule (DNA) 1

3. 1CHEMICAL LEVEL Atoms (C, H, O, N, P) 2 CELLULAR LEVEL Molecule (DNA) Smooth muscle cell 1 2

4. 3 1CHEMICAL LEVEL Atoms (C, H, O, N, P) 2 CELLULAR LEVEL Molecule (DNA) Smooth muscle cell Smooth muscle tissue TISSUE LEVEL 1 2 3

5. 3 4 1CHEMICAL LEVEL Atoms (C, H, O, N, P) 2 CELLULAR LEVEL Molecule (DNA) Smooth muscle cell Smooth muscle tissue Stomach Epithelial tissue ORGAN LEVEL TISSUE LEVEL Smooth muscle tissue layers 1 2 3 4 Serous membrane

6. 3 4 5 1CHEMICAL LEVEL Atoms (C, H, O, N, P) 2 CELLULAR LEVEL Molecule (DNA) Smooth muscle cell Smooth muscle tissue SYSTEM LEVEL Esophagus Liver Stomach Small intestine Large intestine Digestive system Stomach Epithelial tissue ORGAN LEVEL TISSUE LEVEL Smooth muscle tissue layers 1 2 3 4 5 Pancreas Gallbladder Serous membrane

7. 3 4 5 1CHEMICAL LEVEL Atoms (C, H, O, N, P) 2 CELLULAR LEVEL Molecule (DNA) Smooth muscle cell Smooth muscle tissue ORGANISMAL LEVEL SYSTEM LEVEL Esophagus Liver Stomach Pancreas Gallbladder Small intestine Large intestine Digestive system Stomach Epithelial tissue Serous membrane ORGAN LEVEL TISSUE LEVEL Smooth muscle tissue layers 1 2 3 4 5 6