Ornithine cycle also commonly known as Urea cycle is the series of biochemical reactions in which production of urea takes place by degradation of Proteins. The mentioned short video precisely explains the intermediates and enzymesused in the urea cycle. TIMELINE: 0:09 Introduction 0:51 Intermediates of urea cycle 2:04 Urea cycle 2:29 Enzymes used in urea cycle 4:00 End