in keeping with the classical concept of practical constitution of bone which used to be constructed via J. Wolff (1884, 1892) and W. Roux (1895) following the investigations of the sensible structure of the substantia spongiosa by way of H. von Meyer (1867), bone is "functionally" laid down in gross shape in addition to in minute structure in line with the "maximum-minimum-law". due to useful variation, a greatest of potency is completed with no less than fabric (Kummer, 1962a). during this feel useful variation is a response of version of the idiotype-within the boundaries of the response norm-to a replaced inner atmosphere, that's as a result an variation to replaced mechanical stresses. 1. The Formation of the traditional Femur form The heredity foundation of form features of human femora is de facto unknown. exact twins convey an important decrease variability of size of femur than binovular twins. inhabitants variability of size of femur as a result of heritability could exceed two times the variety as a result of environmental components (Knussmann, 1968). an important a part of the complete edition of femur form features continues to be for that reason unexplained supposing that the resources of version as a result of heritability and environmental elements also are approximately a similar for the opposite traits.