The family structure within the family composition and the operating mechanism, reflecting the interaction and relationships between family members. In general, the family members living together with joint production and consumption, and the combination of blood relationship (the relationship between the pro-child, brother and brother), also known as biological production units (the latter with the tenants of the human society household clearly distinguished from).The family isThe basis of the economic division of labor between men and women formed. Included in the more advanced areas within the group, between the same type of regional groups in order to avoid exogamy and inter-family marriage the principle. And maintained a close neighbor relations, is an institutionalized social units. Therefore, it is a universal human-specific units. Animal society and the family units of the same nature in the animal group, parent and offspring a certain period of coexistence. And there is a close interaction between this animal group (see the animal community) can also be called the family or biological family (biological family). The animal group formed by the mother and the rearing of cubs, as well as social insects deformation extended family Group is typical of the biological family. Although the group formed by the male and female individuals (mating association, pair-pond) can not be called the family, but male and female relations, followed by nurturing relationships between parent and offspring, the animal groups during this period known as the family. About the origin of the human family is the anthropology of a difficult problem, since the original chaos married since 1877 Morgan (L.H.Morgan), was critical, so far there is no fixed doctrine.