Guangzhou Sinosource Trade Co., Ltd. [China]

1,ectoderm 2,endoderm 3,blastula cavity 4,gastrula cavity 5,yolk plug

discifications:

1,ectoderm  2,endoderm   3,blastula  cavity4,gastrula  cavity5,yolk  plug

 frog gastrula   late stage  sec

biological slides

 prepared microscope

frog gastrula , late stage ,sec.