Uploaded February 2026 | Updated September 2026, 6 hours ago
Find your 9s with PLUS. Click the link to try for free freesciencelessons.co.uk/modules/gcse-biology-1-triple
Teachers, to get PLUS for your school, email schools@freesciencelessons.co.uk
In this video, we look at the sizes of cells. We explore the meaning of the words millimetre, micrometre and nanometre and how these relate to cells and the objects within cells.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Biology. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Helicobacter pylori By Yutaka Tsutsumi, M.D. Professor Department of Pathology Fujita Health University School of Medicine [Copyrighted free use], via Wikimedia Commons
Lymphocyte By No machine-readable author provided. NicolasGrandjean assumed (based on copyright claims). [GFDL (gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.5-2.0-1.0 (creativecommons.org/licenses/by-sa/2.5-2.0-1.0)], via Wikimedia Commons
Little finger By Pogrebnoj-Alexandroff - open free cources, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=1939117
Ballpoint CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=179315
German shepherd By Ellen Levy Finch (Elf) - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=80113
Neutrophils By Dr Graham Beards - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=20521666
Haemoglobin By Zephyris at the English language Wikipedia, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=2300973
Cheek cells
commons.wikimedia.org/wiki/File:Cheekcells_stained.jpg
Mulletsrokk, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Find your 9s with PLUS. Click the link to try for free freesciencelessons.co.uk/modules/gcse-biology-1-triple
Teachers, to get PLUS for your school, email schools@freesciencelessons.co.uk
In this video, we look at the sizes of cells. We explore the meaning of the words millimetre, micrometre and nanometre and how these relate to cells and the objects within cells.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Biology. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Helicobacter pylori By Yutaka Tsutsumi, M.D. Professor Department of Pathology Fujita Health University School of Medicine [Copyrighted free use], via Wikimedia Commons
Lymphocyte By No machine-readable author provided. NicolasGrandjean assumed (based on copyright claims). [GFDL (gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.5-2.0-1.0 (creativecommons.org/licenses/by-sa/2.5-2.0-1.0)], via Wikimedia Commons
Little finger By Pogrebnoj-Alexandroff - open free cources, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=1939117
Ballpoint CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=179315
German shepherd By Ellen Levy Finch (Elf) - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=80113
Neutrophils By Dr Graham Beards - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=20521666
Haemoglobin By Zephyris at the English language Wikipedia, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=2300973
Cheek cells
commons.wikimedia.org/wiki/File:Cheekcells_stained.jpg
Mulletsrokk, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
