EN
The paper presents the results of a methodological analysis of the experimental biomedical investigations, typical especially for physiological problems. The research activity is described as a multistage process of solving complex problems composed of numerous, mutually related sub-problems. General structure of this process is illustrated with fragments of original publications. The theoretical analysis as well as the study of original texts, describing biomedical research activities, make possible to arrive at conclusions concerning the form of the statements that are common results of physiological experiments; these statements deal with multi-argument relations linking the values of the features of objects under study. The propositions that are the direct results of the experiments are incorporated into the bulk of the general knowledge; various semantic levels of the biomedical knowledge are described.