World of the Cell: Chapter 1 "A preview of the cell" (6 MB)
World of the Cell: Chapter 15 "Cytoskeletal Systems" (11 MB)
World of the Cell: Chapter 16 "Cellular Movements" (7 MB)
World of the Cell: Chapter 17 "Beyond the Cell" (18 MB)
World of the Cell: Chapter Appendix "Visualizing Cells and Molecules" (24 MB)