Objective:Study the general and special biological characteristics of intestinal epithelial cells(IEC)ofPheretima aspergillum(E.Perrier),establishthe test method and reference standard ofIEC,s biology characteristics;obtain the valuable experimental data about morphology,structure,metabolism and proliferation of IECin order toproviede asolid foundation forfurther study of DNA replication,transcription,protein synthesis,energy metabolism and cell proliferation.It also provides the necessary technical support...