منابع مشابه
The Vertebrate Skeleton
This is one of the "Cambridge Natural Science Manuals," and is written by a lecturer at University College, Bristol. It Consists, briefly, of the following: first come short chapters on the lowest members of the vertebrate phylum, on the various dements of the skeleton, and on the classification of the Vertebrate groups. Each group is then taken in turn, an ?account is given of its general skel...
متن کاملDevelopmental Paleobiology of the Vertebrate Skeleton.
Studies of the development of organisms can reveal crucial information on homology of structures. Developmental data are not peculiar to living organisms, and they are routinely preserved in the mineralized tissues that comprise the vertebrate skeleton, allowing us to obtain direct insight into the developmental evolution of this most formative of vertebrate innovations. The pattern of developm...
متن کاملHox patterning of the vertebrate axial skeleton.
The axial skeleton in all vertebrates is composed of similar components that extend from anterior to posterior along the body axis: the occipital skull bones and cervical, thoracic, lumbar, sacral, and caudal vertebrae. Despite significant changes in the number and size of these elements during evolution, the basic character of these anatomical elements, as well as the order in which they appea...
متن کاملHistology of the heterostracan dermal skeleton: Insight into the origin of the vertebrate mineralised skeleton
Living vertebrates are divided into those that possess a fully formed and fully mineralised skeleton (gnathostomes) versus those that possess only unmineralised cartilaginous rudiments (cyclostomes). As such, extinct phylogenetic intermediates of these living lineages afford unique insights into the evolutionary assembly of the vertebrate mineralised skeleton and its canonical tissue types. Ext...
متن کاملGenome duplication and the origin of the vertebrate skeleton.
During vertebrate embryonic development, tissue patterning and differentiation are regulated by members of multigene families. Evolutionary expansion of these families is thought to have played a role in the evolution of anatomical complexity, including the origins of new cell and tissue types. A defining feature of vertebrates is an endoskeleton, the primary components of which are cartilage a...
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ژورنال
عنوان ژورنال: Nature
سال: 1870
ISSN: 0028-0836,1476-4687
DOI: 10.1038/002291a0