Description: Segment 1 Hill talks to camera and introduces the subject. He shows a film which visualises blood flow through a heart valve, he points out how complicated the flow patterns are, and in particular the areas of turbulent flow. A further film is shown which compares fluid and electrical flow patterns, then the flow patterns of different types of liquid. Time start: 00:00:00:00 Time end: 00:04:54:00 Length: 00:04:54:00 Segment 2 Hill shows an animated model demonstrating flow patterns through a series of layers of molecules, as might happen in a blood vessel. To explain this further, he then shows an animated model looking at how a fluid flows down a pipe - he describes the various patterns of flow in depth. Hill then introduces the concept of Newton's law of viscous flow and applies it to his animated model. He points out that Newton's law applies only to laminar or streamline flow with a fluid of constant viscosity. Next Hill talks about the Hagen-Poiseuille equation which helps to calculate volume flow rates down tubes - Hill applies this to a variety of endotracheal tubes used in surgery. Time start: 00:04:54:00 Time end: 00:11:20:00 Length: 00:06:26:00 Segment 3 We are shown a film of a pneumotachograph, a device for measuring the volume flow rage of gasses these are widely used in respiratory and lung function studies. Hill shows an animated model of the progression of different velocity molecules down a pipe, then refers to graphs comparing turbulent and laminar flow. Time start: 00:11:20:00 Time end: 00:16:26:00 Length: 00:05:06:00 Segment 4 Hill shows 5 pairs of illustrations showing different flow patterns taken from water flowing through a 2cm long glass tube with dye injected halfway along. He describes how the different rates of dye injection (either continuous or sporadic at varying intervals) show up the different patterns of flow rate. He then applies these to the practice of anaesthesia, for instance, by looking at how areas of athersclerosis in an artery can change the patterns of blood flow. Time start: 00:16:26:00 Time end: 00:20:14:00 Length: 00:03:48:00 Segment 6 Hill summarises the lecture, referring back to earlier films, graphs and diagrams. He describes again the streamline flow pattern, the Hagen-Poiseuille equation and Newton's law of viscosity. Finally he provides a list of publications for further study into the subject. Time start: 00:25:52:15 Time end: 00:28:29:02 Length: 00:02:36:12