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| | | 荠菜幼胚切片(200X)
Young
embryo of shepherd's purse,sec.
⑴珠被(integument) ⑵基细胞(basal cell) ⑶胚柄(suspensor)
⑷原胚(proembryo)
⑸核型胚乳(endosperm) |
| | | | 荠菜老胚切片(200X)
Old
embryo of shepherd's purse,sec.
⑴种皮(seed coat) ⑵基细胞(basal cell) ⑶胚根(radicle)
⑷胚轴(hypocotyl)
⑸胚芽(plumule) ⑹子叶(cotyledon) |
| | | | 蛙晚期原肠胚期切片(40X)
Frog
gastrula,late stage,sec.
⑴外胚层(ectoderm) ⑵内胚层(endoderm) ⑶囊胚腔(blastula cavity)
⑷原肠腔(gastrula
cavity) ⑸卵黄栓(yolk plug) |
| | | | 果蝇唾腺巨型染色体装片(1000X)
Giant
chromosomes in the sali vary gland of fruit fly,w.m. |
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