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hypoblast
The hypoblast is a tissue type that forms from the inner cell mass.〔(UNSW Embryology- Glossary H )〕 It lies beneath the epiblast and consists of small cuboidal cells.〔Moore, K. L., and Persaud, T. V. N. (2003). ''The Developing Human: Clinically Oriented Embryology''. 7th Ed. Philadelphia: Elsevier. ISBN 0-7216-9412-8.〕 Extraembryonic endoderm (including Yolk sac) is derived from hypoblast cells. The absence of hypoblast results in multiple primitive streaks in chicken embryos. The formation of the primitive streak, through which gastrulation occurs, is induced by Koller's sickle.〔Gilbert SF. Developmental Biology. 10th edition. Sunderland (MA): Sinauer Associates; 2014. Early Development in Birds. Print〕 ==Structure==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「hypoblast」の詳細全文を読む
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