The diversification of structure and hardness of 18 muscles was investigated in bulls of the black-and-white breed in the age between 20-22 months. The histological specimens were prepared by means of the paraffin method. The structure (fibre surface, perimysium thickness and the contents of intramuscular fat) was evaluated by means of a computer analysis of a MultiScan picture. The hardness was tested by an Instron 1140 apparatus at 80% distortion. The sequencing of the obtained results according to multiplicity was completed by means of an ascending muscle series as well as with an analysis of the divergence significance. However, contrary to the formerly applied methods, the muscles were grouped in series assuming their statistical homogeneity or significant divergences in relation to the muscle having the closest value to the mean of the given indicator as the basic criteria of grouping. The majority of muscles indicated a tendency towards increased hardness, an increase in the fibre surface and perimysium thickness and a decrease in fat content.