Rewell R E, Harrison R G
J Anat. 1976 Feb;121(Pt 1):65-70.
A presomite embryo of Horizon VII aged approximately 18 days is described and illustrated. It is compared with some other embryos of a similar age, and a considerable variation of histological characteristics within the same Horizon is noted.
描述并展示了一个大约18天大的VII期前体节胚胎。将其与其他一些相同年龄的胚胎进行了比较,并注意到在同一期内组织学特征存在相当大的差异。