Frozen and paraffin sections may be used for the study of the inner structure of organs and tissues in scanning electron microscope; this increases the value of this instrument and gives a lot of new information. The new method gives a good view of the alveolar (arch) structure of the heart valves which appears to be the morphological foundation of their durability and elasticity. There are reasons to believe that connective tissue in different parts of the body is characterized by the alveolar (cellular) structure which seems to be the morphological foundation of its supporting function. The dynamic loading forms and creates the organ specificity of the connective tissue stroma. Like honeycombs, the connective tissue consists of cells the formation of which is significantly affected by the features of dynamic loading on the tissue or and organ.