Four types of the of grafts from the organizer area were transplanted into host embryos to see if the epiblast or hypoblast of the organizer area had an ability to induce a secondaryembryo.
并将组织者区域的细胞移植到宿主胚胎中，验证其诱导次级胚胎的能力。
2
The primary follicles and secondary follicles of Rex rabbits appeared during the 18th to 24th day of embryo development.
力克斯兔的初级毛囊、次级毛囊于胚胎的18 ~ 24天先后出现。
3
The mature embryo sac is surrounded by en lothelium tapetum. It is composed or an egg apparatus, one central cell with secondary nucleus, and 1—6 antipodal cells.