Contents: I : General: 1. The cell and its diversity. 2. How a cell is studied? II : Cell structure and function: 3. Cell membrane structure and functions. 4. The cell surface and cellular interactions. 5. The Cytoskeleton. 6. Mitochondria and cell energetics. 7. Chloroplast. 8. Endoplasmic reticulum. 9. Golgi complex. 10. Lysosomes, endosomes and microbodies. 11. Ribosomes. 12. Centrioles. 13. Interphase nucleus. 14. Chromosomes. III : Chemical composition of protoplasm: 15. Introduction. 16. Proteins. 17. Carbohydrates. 18. Lipids. 19. Nucleic acids. 20. Enzymes. IV : Cell division: 21. Mitosis. 22. Meiosis. 23. Cell cycle. V : Cell metabolism: 24. Metabolism: general considerations. 25. Metabolism: carbohydrates. 26. Metabolism: protein. 27. Metabolism: lipids. 28. Metabolism nuclic acid. 29. Metabolism: inborn errors. VI : Special topics: 30. Cell and tissue culture. 31. Cellular aging and senescence. 32. Immunity. 33. Genetic engineering. 34. Neoplasia. Glossary.