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多年来胚胎学家和其他学者对再生过程感到兴趣。在所有的动物中可以看到,部分器官、组织、细胞损伤和切除后,均有不同程度的再生。腔肠动物和扁形动物具有显著的再生能力,可从离体细胞或组织再生出整个组织。蝾螈肢体和尾的再生可以作为发生学上较高级的无脊椎动物再生的典型例子。哺乳动物伤口愈合方式和身体某些区域上皮的迅速覆盖,也表明其再生能力。因此可以认为,再生是所有生物体的基本和普遍存在的属性,不过种类不同的生物体所具有的再生能力各不相同。
Embryologists and other scholars have been interested in the regeneration process for many years. In all the animals, it can be seen that some organs, tissues, cells are damaged and resected to varying degrees. Coelenterates and flat animals have significant regenerative ability to regenerate whole tissue from ex vivo cells or tissues. The regeneration of salamander limbs and tails can serve as a classic example of the more advanced invertebrate regeneration. Mammalian wound healing patterns and rapid coverage of the epithelium in some areas of the body also indicate their ability to regenerate. Therefore, it can be considered that regeneration is the basic and ubiquitous property of all living organisms, but different kinds of living organisms have different regenerative capacities.