“Reptilia”的概念、定义、翻译、参考文献-科学参考

Reptilia

Biology

The class that contains the first entirely terrestrial vertebrates, which can live in dry terrestrial habitats as their skin is covered by a layer of horny scales, preventing water loss. They breathe atmospheric oxygen by means of lungs assisted by respiratory movements principally involving the ribs (there is no diaphragm). Reptiles are cold-blooded (see poikilothermy) but behavioural patterns make it possible for them to maintain a fairly even body temperature throughout the day. Fertilization is internal and the majority of reptiles lay eggs on land. These eggs have a porous shell to provide protection from desiccation and allow gas exchange. In some reptiles the eggs are retained within the body of the mother until the young are ready to hatch, thereby greatly reducing juvenile mortality (see ovoviviparity).
The class includes the modern crocodiles, lizards and snakes (see squamata), and tortoises and turtles, as well as many extinct forms, such as the dinosaurs and Pterosauria. This grouping is paraphyletic because it excludes the birds, descendants of theropod dinosaurs. Hence, contemporary classification schemes generally include birds as a constituent group of the reptiles.
http://www.tolweb.org/Amniota/14990 This Amniota page from the Tree of Life project shows the phylogenetic relationships of reptile groups, birds, and mammals

Geology and Earth Sciences

Large and varied class of poikilothermic vertebrates, which arose in the Carboniferous from labyrinthodont amphibians. They were the dominant animals of the Mesozoic world and gave rise to the birds and mammals. Reptiles have a body covering of ectodermal scales, sometimes supported by bony scutes. There is no gilled larval phase; development is by amniote egg, but ovovivipary is common. Reptiles are air-breathing from hatching onwards.

单词	Reptilia
释义	Reptilia Biology The class that contains the first entirely terrestrial vertebrates, which can live in dry terrestrial habitats as their skin is covered by a layer of horny scales, preventing water loss. They breathe atmospheric oxygen by means of lungs assisted by respiratory movements principally involving the ribs (there is no diaphragm). Reptiles are cold-blooded (see poikilothermy) but behavioural patterns make it possible for them to maintain a fairly even body temperature throughout the day. Fertilization is internal and the majority of reptiles lay eggs on land. These eggs have a porous shell to provide protection from desiccation and allow gas exchange. In some reptiles the eggs are retained within the body of the mother until the young are ready to hatch, thereby greatly reducing juvenile mortality (see ovoviviparity). The class includes the modern crocodiles, lizards and snakes (see squamata), and tortoises and turtles, as well as many extinct forms, such as the dinosaurs and Pterosauria. This grouping is paraphyletic because it excludes the birds, descendants of theropod dinosaurs. Hence, contemporary classification schemes generally include birds as a constituent group of the reptiles. http://www.tolweb.org/Amniota/14990 This Amniota page from the Tree of Life project shows the phylogenetic relationships of reptile groups, birds, and mammals Geology and Earth Sciences Large and varied class of poikilothermic vertebrates, which arose in the Carboniferous from labyrinthodont amphibians. They were the dominant animals of the Mesozoic world and gave rise to the birds and mammals. Reptiles have a body covering of ectodermal scales, sometimes supported by bony scutes. There is no gilled larval phase; development is by amniote egg, but ovovivipary is common. Reptiles are air-breathing from hatching onwards.
随便看	carbonyl compound carbonyl group carbon–nitrogen cycle carbon ‘burning’ carboranes carborundum carboxyhaemoglobin carboxylase carboxylate carboxyl group carboxylic acids carboxypeptidase carboxysome carboy carburization carburize carbylamine reaction carbyne carceral geography carcerulus carcinogen carcinoma card Cardano, Gerolamo Cardano, Girolamo (1501–76)