A tour of the cell
A tour of the cell

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.


Except for third party materials and otherwise stated (see terms and conditions [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] ), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence.

Course image: Umberto Salvagnin in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.

The material acknowledged below is Proprietary, used under licence and not subject to Creative Commons licence. See terms and conditions. Grateful acknowledgement is made to the following:


Figure 2b: Dr Gopal Murti/Science Photo Library;

Figure 3: Courtesy of Heather Davies, Department of Life, Health and Chemical Sciences, Open University;

Figure 10: Dr Torsten Wittmann/Science Photo Library;

Figure 11a, 17a, 19a and 22a: Courtesy of Professor Michael Stewart, Department of Life, Health and Chemical Sciences, Open University;

Figure 12: Adapted from Purves, W.K. et al. (1998) Life, the Science of Biology, 5th edn, Sinauer Associates Inc;

Figure 14: Dr Richard Kessel and Dr Gene Shih, Visuals Unlimited/Science Photo Library;

Figure 16: Photo printed with permission from O. L. Miller, B. A. Hamkalo and C. A. Thomas Jr;

Figure 21a: CNRI/ Science Photo Library;

Figure 21b: Dr Don Fawcett/Science Photo Library;

Figure 22c: Dr Gopal Murti/Science Photo Library;

Figure 24: Courtesy of Jill Saffrey, Department of Life, Health and Chemical Sciences, Open University.

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.

Don't miss out:

If reading this text has inspired you to learn more, you may be interested in joining the millions of people who discover our free learning resources and qualifications by visiting The Open University - www.open.edu/ openlearn/ free-courses

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371