Search academic texts

Information × Registration Number 0206U000385, 0100U006489 , R & D reports Title FACTORS AND MECHANISMS FORMATION OF THE ORGAN SYSTEMS IN EVOLUTION OF VERTEBRATES. popup.stage_title Head Kovtun Mikhail Fotievich, Registration Date 24-01-2006 Organization Schmalhausen Institute of Zoology NAS of Ukraine popup.description2 It is investigated embryonic development of separate organs and systems in representatives of e Aves and Mammalia classes. The phenomenon of the heterochrony at all investigated species and on all stages of the development is revealed. It is established, that in birds the heterochrony take place, both in the embryonic, and in the early postembryonic periods of the ontogenesis, that they have different character in representatives altricial and precocial birds. It is drawn the conclusion concerning of the primacy precocial type of the development (of the maturonation) in birds, and maturonation of the mammals. Obtained data open ways of occurrence of a phylogenetic line to birds. It is established, that the reorganization of the skeleton and muscles of the caudal areas in reptile birds had the same great value in evolutionary becoming class Aves as well as reorganization of a chest belt and chest limbs. It has been shown tendencies and law of reorganizations. The theoretical model of ascending limb which has made possible wide adaptive radiation of Artiodactyla has been created on the basis of literary data on fossil of Condylartra and own data on modern Artiodactyla . The hypothesis about a role of a flying membrane of bats, as additional respiratory organ is put forward. EVOLUTION, LOCOMOTION, PRENATAL ONTOGENESIS, HETEROCHRONY, FUNCTION, STRUCTURE. Product Description popup.authors popup.nrat_date 2020-04-02 Close