Grateful acknowledgement is made to the following sources:


Animal cell
Animal cell 1 of 3. © Dr H. Jastrow.
Animal cell 2 of 3. © Dr H. Jastrow.
Animal cell 3 of 3. © Dr H. Jastrow.
Cell membrane 1 of 3: Don W. Fawcett, used under a Creative Commons Attribution Non-Commercial, No Derivatives licence.
Cell membrane 2 of 3: George E. Palade, used under a Creative Commons Attribution Non-Commercial, Share Alike licence.
Cell membrane 3 of 3: © Dr H. Jastrow.
Centrosome: Image generously made available by William Brinkley (Baylor). Original resource provided by Keith R. Porter Archives (University of Maryland Baltimore County, Baltimore, MD). This image was created by Manley McGill in 1976 while he was a member of the laboratory of William Brinkley at The University of Texas Medical Branch, Galveston. Dr Brinkley (currently at Baylor College of Medicine) has dedicated this publication to the memory of his former student.
Cytoskeleton 1 of 4: © Dr H. Jastrow.
Cytoskeleton 2 of 4: U.S. Department of Health and Human Services,  National Institute of General Medical Sciences Image Gallery.
Cytoskeleton 3 of 4: Feldman, M. E., Apsel,  B., Uotila, A., Loewith, R., Knight, Z.A. et al. (2009) Active-Site Inhibitors of mTOR Target Rapamycin-Resistant Outputs of mTORC1 and mTORC2. PLoS Biol 7(2): e1000038. doi:10.1371/journal.pbio.1000038. Used under a Creative Commons Attribution Licence.
Cytoskeleton 4 of 4: Patricia Wadsworth, 2007 Olympus BioScapes Digital Imaging Competition. Used under a Creative Commons, Attribution Non-Commercial; No Derivatives Licence.
Golgi apparatus:   Mary Morphew, J. Richard McIntosh, Mark Ladinsky.
Lysosomes: © Dr H. Jastrow.
Mitochondria: Keith Porter, used under a Creative Commons Attribution Non-Commercial, No Derivatives licence.
Nucleolus: © Dr H. Jastrow.
Nucleus 1 of 2: © Dr H. Jastrow.
Nucleus 2 of 2: Hans Ris
Peroxisomes: © Dr H. Jastrow.
Ribosomes: George E. Palade, used under a Creative Commons Attribution, Non-Commercial Share Alike licence.
Rough ER: George E. Palade, used under a Creative Commons Attribution, Non-Commercial Share Alike licence.
Smooth ER: © Dr H. Jastrow.

Plant cell
Plant cell: University of Wisconsin Plant Teaching Collection.
Cell-membrane:  University of Wisconsin Plant Teaching Collection.
Cell wall:   University of Wisconsin Plant Teaching Collection.
Chloroplasts 1 of 2:  University of Wisconsin Plant Teaching Collection.
Chloroplasts 2 of 2:  University of Wisconsin Plant Teaching Collection.
Plasmodesmata 1 of 2:  University of Wisconsin Plant Teaching Collection.
Plasmodesmata 2 of 2:   University of Wisconsin Plant Teaching Collection.
Golgi apparatus:  University of Wisconsin Plant Teaching Collection.
Mitochondria: University of Wisconsin Plant Teaching Collection.
Nucleus 1 of 2: University of Wisconsin Plant Teaching Collection.
Nucleus 2 of 2: University of Wisconsin Plant Teaching Collection.
Nucleolus: University of Wisconsin Plant Teaching Collection.
Peroxisomes: University of Wisconsin Plant Teaching Collection.
Ribosomes: University of Wisconsin Plant Teaching Collection.
Endoplasmic reticulum: University of Wisconsin Plant Teaching Collection.
Vacuole: Dr Jeremy Burgess/Science Photo Library.

Cell types
Plasma cell: © Dr H. Jastrow.
Neuron: ©  Dr H. Jastrow.
Chondroblast: ©  Dr H. Jastrow.
Pituitary cell: © Dr H. Jastrow.
Mouse skeletal muscle:  Hanna Osinska.
Columnar epithelial cell: © Dr H. Jastrow.
Capillary: © Dr H. Jastrow.
Schwann cell and nerve axon: © Dr H. Jastrow.
White fat cell. © Dr H. Jastrow.
Neutrophil: © Dr H. Jastrow.
Hepatocyte: ©  Dr H. Jastrow.

Every effort has been made to contact copyright holders. If any have been inadvertently overlooked the publishers will be pleased to make the necessary arrangements at the first opportunity.