Description: Segment 1 Opening credits. Dr Smith introduces his topic, beginning by discussing the composition of the human body, its energy supply and utilisation and its hormonal control. A diagram shows the composition of an ideal 70kg man. Further diagrams show the supply and use of energy in the human body, and Smith talks about the role of the liver, fat and glucose. He then compares an overweight 140kg man with the 70kg man and also discusses the role of amino acids. Time start: 00:00:00:00 Time end: 00:06:22:15 Length: 00:06:22:15 Segment 2 Diagrams show amino acid formulae and the role of hormones in metabolic processes as Smith discusses these topics. He goes on to talk about what happens to the body after an average injury. Tables and diagrams also show information on this subject. Time start: 00:06:22:15 Time end: 00:10:04:00 Length: 00:03:41:10 Segment 3 Smith discusses the effects of injury on body composition, energy exchange and on hormonal control, explaining loss of muscle protein, change in muscle protein metabolism, change in ketone body levels and decrease in insulin. Time start: 00:10:04:00 Time end: 00:15:17:00 Length: 00:05:13:00 Segment 4 Smith goes on to talk about other effects of severe injury, including immobility and sepsis, and also briefly discusses burns. He talks about previous publications that have dealt with the subject of immobility and its effect on the skeleton and muscles. A table shows the effects of burns on the metabolism. He talks about the American black bear that burns its own fat during winter as its sole source of fuel. He finishes the film by discussing new ideas in the area of injury and nutrition and three key problems in the study of metabolic effects of injury: how ketone bodies influence gluconeogenesis, the importance of branched-chain amino acids and the biochemical effects of immobility. Time start: 00:15:17:00 Time end: 00:20:06:20 Length: 00:04:49:20