This channel is excellent for Biology students looking for some online revision. Made by an experienced biology teacher from my school ! Really useful! Covers a range of topics with great detail. Leaving cert focused material !
http://www.handwrittentutorials.com - This tutorial explores the function of the nephron, in particular: Filtration, Reabsorption, Secretion and Excretion. This video explains the solutes involved and how they are processed by the nephron. It is recommended that you view the Renal Anatomy series before watching this tutorial. For more entirely FREE tutorials and their accompanying PDFs, visit http://www.handwrittentutorials.com