• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American Zoologist >Development of cardiac function in crustaceans: Patterns and processes
【24h】

Development of cardiac function in crustaceans: Patterns and processes

机译：甲壳动物心脏功能的发展：模式和过程

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

SYNOPSIS. Patterns and mechanisms involved in tile onset and development of cardiac function in a number of crustacean groups are critically reviewed. Irrespective of phylogeny, heart design and ecology, the onset of heart beat seems inextricably linked to the ontogeny of the thoracic segments where the heart is located. Initially the beat is erratic but soon becomes regular and the rate increases as development proceeds. However, still early in development the relationship between heart rate and body size shifts from a positive to a negative one. Nevertheless cardiac output continues to increase with increasing development, via increasing stroke volume. Some species in more 'primitive' groups develop and retain a myogenic heart beat. Others, with globular and tubular hearts, exhibit a shift from myogenicity to neurogenicity around the time the body size vs. heart rate relationship becomes negative. Very early cardiac function seems generally insensitive to external factors, such as temperature, oxygen and pollutants. Sensitivity to environmental factors increases with development, perhaps over the same timescale as the cardiac regulatory mechanisms appear.
机译：概要。批判性地审查了许多甲壳类动物的发病和心脏功能发展所涉及的模式和机制。无论系统发育，心脏设计和生态如何，心跳的发作似乎都与心脏所在的胸段的个体发育有着千丝万缕的联系。最初，节拍不稳定，但很快就变得规律起来，并且随着开发的进行，速率增加。但是，在发展的早期，心率和体重之间的关系就从正值变为负值。然而，通过增加中风量，心输出量随着发育的增加而继续增加。更多“原始”群体中的某些物种发育并保留肌原性心跳。其他具有球状和肾小管的心脏在体重与心率之间的关系变为负值时表现出从成肌向成神经的转变。早期心脏功能似乎通常对外界因素不敏感，例如温度，氧气和污染物。对环境因素的敏感性会随着发展而增加，可能与心脏调节机制出现的时间相同。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号