LIST OF ILLUSTRATION 



FIG. PAGE 



1. Diagram illustrating various theories of cell structure . . 2 



2. Spheroidal cells 3 



3. Epithelial cells containing a nebenkern 3 



4. Alveolar structure of protoplasm ...... 4 



5. Developing fat cells ......... 5 



6. Ciliate and flagellate cells 7 



7. Synctimn in a villus of the human placenta .... 7 



8. Intercellular bridges in epithelial cells of the Malpighian layer 



of the skin 8 



9. Leucocyte from human blood in active amoeboid motion . . 9 



10. Various forms of cells 10 



11. Direct cell division . . . . . . . . .11 



12. Diagram of prophase of mitosis 12 



13. Metaphase and telaphase of mitosis . . . . .13 



14. Epidermis of salamander, showing cells in process of division 



by mitosis . . . . . . / . . . .14 



15. Secretory capillaries of the gastric glands 17 



16. Secretory capillaries of the pancreas . . . . . .18 



17. " Terminal bars " in the epithelium of the pyloric glands . . 18 



18. Polyhedral epithelium from the human liver . . . .21 



19. Squamous epithelium or endothelium ...... 22 



20. Columnar epithelium from pyloric region of the human stomach 22 



21. Cuboidal epithelium from the rete testis of a rabbit ... 23 



22. Columnar ciliated epithelium from the epididymis of a rabbit . 23 



23. Glandular epithelium 24 



24. Goblet cells of Lieberkiihn's crypts ...... 25 



25. Diagram showing arrangement of cells in the preceding figure . 25 



26. Stratified epithelium from human esophagus .... 27 



27. Keratized epithelium of the skin 28 



28. Transitional epithelium from the ureter of an infant ... 29 



29. Isolated cells of human urine ....... 29 



30. Pseudo-stratified columnar ciliated epithelium from a bronchial 



tube of man .......... 30 



31. Diagram showing connection of epithelial cells of pseudo-stratified 



ciliated epithelium with the basement membrane . . .30 



32. Embryonic connective tissue, early stage ..... 32 



33. Embryonic connective tissue, later stage 32 



34. Areolar connective tissue 33 



ix 



