This book presents, in a practical way, an exploration of lipid metabolism, protein metabolism, practical works with carbohydrates, the significance of blood cytological examination in peripheral blood, characteristics of acute and chronic anaemia, metabolic syndrome status, functional exploration of the kidney, urine analysis and culture with technique antibiogram for the diagnosis of the main groups of microorganisms in the human organism. It features many picture examples of interest for doctors, teachers in medicine universities, medical students, as well as staff working in clinical laboratories.