There are several other excretory mechanisms in earthworms.蚯蚓有好几种排泄机制.In the earthworm and many other invertebrates, these excretory structures are called nephridia.在蚯蚓和许多其它无脊椎动物中, 这些排泄结构称为肾管.Describe the excretory syste...
There are several other excretory mechanisms in earthworms.蚯蚓有好几种排泄机制.Describe the excretory system of the genus Nereis briefly.简述沙蚕属的排泄系统.an excretory organ of certain invertebrates.某些无脊椎动物的排泄器官In the earthworm and many...
这一区分的某些原因可简单陈述如下.Some of the reasons for this distinction can be briefly stated.存在许多可以截然区分的变种.Many varieties existed which differed from one another in clear - cut ways.他们是全同的和不可区分的.They are identical and indistinguishab...
Methods Endoscopic observation and mucosal biopsies graft through the terminal ileum enterostomy were carried out.方法自末端回肠肠造口行内镜检查,观察肠粘膜变化并钳取肠粘膜组织做病理学检查....