Uploaded September 2024 | Updated September 2026, 2 days ago
In this video, we look at how kidney failure can be treated by a kidney transplant. We look at the advantages of a kidney transplant compared to kidney dialysis. We also look at the problems associated with kidney transplants, including the risk of tissue rejection. We explore how the risk of rejection can be reduced using tissue matching and immunosuppressant drugs.
Image credits:
Kidney for transplant
commons.wikimedia.org/wiki/File:Kidney_for_transplant_from_live_donor.jpg
Rmarlin, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
Dialysis machine INNOVA
commons.wikimedia.org/wiki/File:Hemodialysis_machine_INNOVA.jpg
Виталий Поспелов, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Plugged into dialysis
commons.wikimedia.org/wiki/File:Plugged_into_dialysis.jpg
Dan from United Kingdom, CC BY 2.0 creativecommons.org/licenses/by/2.0, via Wikimedia Commons
Kidney transplant
commons.wikimedia.org/wiki/File:Kidney_Transplant.png
BruceBlaus, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
Cyclosporin
commons.wikimedia.org/wiki/File:Equoral_50_mg_cps.jpg
Tomino de WS, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
In this video, we look at how kidney failure can be treated by a kidney transplant. We look at the advantages of a kidney transplant compared to kidney dialysis. We also look at the problems associated with kidney transplants, including the risk of tissue rejection. We explore how the risk of rejection can be reduced using tissue matching and immunosuppressant drugs.
Image credits:
Kidney for transplant
commons.wikimedia.org/wiki/File:Kidney_for_transplant_from_live_donor.jpg
Rmarlin, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
Dialysis machine INNOVA
commons.wikimedia.org/wiki/File:Hemodialysis_machine_INNOVA.jpg
Виталий Поспелов, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Plugged into dialysis
commons.wikimedia.org/wiki/File:Plugged_into_dialysis.jpg
Dan from United Kingdom, CC BY 2.0 creativecommons.org/licenses/by/2.0, via Wikimedia Commons
Kidney transplant
commons.wikimedia.org/wiki/File:Kidney_Transplant.png
BruceBlaus, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
Cyclosporin
commons.wikimedia.org/wiki/File:Equoral_50_mg_cps.jpg
Tomino de WS, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons


![GCSE Chemistry Revision Elements, Compounds and Mixtures
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In this video, we look at elements, compounds, mixtures and molecules. First we look at the idea of an element, using examples from the periodic table. I then show you the definition of a compound and what is meant by fixed proportions. We then explore the definition of a mixture and the differences between mixtures and compounds. Finally, we look at what is meant by the word molecule and see how molecules can be elements or compounds.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. 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:
Magnesium https://commons.wikimedia.org/wiki/File:Magnesium-2.jpg
By Jurii (http://images-of-elements.com/magnesium.php) [CC BY 3.0 (https://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
Sulfur https://commons.wikimedia.org/wiki/File:Sulfur-sample.jpg
By Ben Mills [Public domain], from Wikimedia Commons
Magnesium sulfide https://commons.wikimedia.org/wiki/File:Lithium_chloride.jpg GCSE Chemistry Revision Elements, Compounds and Mixtures](https://i.ytimg.com/vi/nUzOXy9V-K0/mqdefault.jpg)


![GCSE Chemistry Revision Metals and Alloys
Find your 9s with PLUS. Click the link to try for free https://www.freesciencelessons.co.uk/modules/gcse-chemistry-1-triple/
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In this video, we look at the properties of metals and of alloys. First we explore the structure of metals, looking at metallic bonding and the sea of delocalised electrons. We use this to explain why pure metals can be bent and shaped, why metals can conduct electricity and heat and why metals have high melting and boiling points. We then look at the structure of alloys and use this to explain why alloys are harder than pure metals.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. 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:
Gold ingot (By Swiss Banker [Public domain], via Wikimedia Commons)
Bronze guitar string (By Badagnani (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons) GCSE Chemistry Revision Metals and Alloys](https://i.ytimg.com/vi/o56nWrsp-hI/mqdefault.jpg)




![GCSE Chemistry Revision Alpha Scattering Experiment
Find your 9s with PLUS. Click the link to try for free https://www.freesciencelessons.co.uk/modules/gcse-chemistry-1-triple/
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In this video, we look at the alpha scattering experiment. First we look at what the ancient Greeks thought about the structure of atoms and how this was disproven by the discovery of the electron. We then explore an early model of atomic structure called the plum pudding model. Next we look at the alpha scattering experiment. We explore how the alpha scattering experiment was carried out including why gold foil was used. We then look at how the results of the alpha scattering experiment told scientists that atoms are mainly empty space, with a central positive nucleus containing most of the mass of the atom and electrons around the edge. Finally, we look at how scientists replaced the plum pudding model with the nuclear model of atomic structure.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. 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:
Democritus (By Original uploader was Odysses - Museo archeologico nazionale di Napoli, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18503479)
Plum pudding (https://commons.wikimedia.org/wiki/File%3AJersey_Christmas_pudding_pod%C3%AEn_dflieu.jpg
By Man vyi (Self-photographed) [Public domain], via Wikimedia Commons)
Gold foil (By Eckhard Pecher - Own work, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1465931) GCSE Chemistry Revision Alpha Scattering Experiment](https://i.ytimg.com/vi/qAlpNXO_FRE/mqdefault.jpg)