On the basis of the ultrastructure of the Haversian lamellar system of bones analyses from the biomechanical viewpoint were undertaken. Instead of computed results preference was given to comparisons with tubes, fibres and nets so as to demonstrate clearly the building principle and movement phenomena. From the course of the collagenous fibres the tensile strains could be discerned which facilitated to determine also the direction of the compressive strains. The mineral components of the bone tissue are oriented toward the direction of the compressive strains. The construction principle of the lamella, however, facilitates reversible deformations and thus regeneration processes which distinguishes it from other technical building principles.
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