Biruk Y. Age of feature of changes of a skeleton of chest finiteness of a coypus in postnatal ontogenesis

The object - the bones of forelimb of coypus. The aim - to establish laws of morphological and biomechanical changes in bones of chest finiteness of a nutria in postnatal the period of ontogenesis and sexual features of their development. The methods - anatomic preparation, morfometria, regressio-correlation and biomechanical analyses, manufacturing of histological cuts. The novelty - For the first time are lead complex morpho-mechanical and histological researches of bones of chest finiteness of a coypus in postnatal the period ontogenesis and the characteristic of their sexual changes is sent. Laws of intensity of growth of weight of a body and bones of chest finiteness with the years animals, allometrical dependences of growth of bones and their separate structural elements on weight of a body and ontogenetical changes of histologic structure of bones are established. Thus morphometrical by researches it is established, that intensity of growth occurs non-uniformly: the greatest intensity of growthis marked from 45 till 120 day of a life of an animal, the least - from 240 till 365 day. It is established, that clavicula grows at length faster, than bones of free finiteness. At increase in the sizes of animals the length of bones of free finiteness on a mass unit of a body decreases, that is proportions between their length and diameter change in such a manner that they in due course become rather short and thin (behind exception sagital diameter ulna and beam bones); the relative sizes of bones of free finiteness decrease, and parities of their length and diameter - increase. The cut of a humeral bone becomes the ellipse form with the big stock of capacity and rigidity in sagital planes. Growth of the area clavicule occurs proportionally to weight of a body. Becoming of a maturity of a skeleton of finitenesses on micro- a level occurs by 180 day of a life of a coypus.