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The cumulus oophorus (Latin ''cumulus''=heap, Greek ''oo''=egg + ''phor''=carrier; Latinized ending "-us"), also called discus proligerus, is a cluster of cells (called cumulus cells) that surround the oocyte both in the ovarian follicle and after ovulation. In the antral follicle, it may be regarded as an extension of the membrana granulosa. The innermost layer of these cells is the corona radiata. This layer of cells must be penetrated by spermatozoa in order for fertilization to occur. ==Functions== Functions of the cumulus oophorus include coordination of follicular development and oocyte maturation. Mechanisms of the latter include stimulation of amino acid transport and sterol biosynthesis and regulation of oocyte gene transcription.〔 It also provides energy substrates for oocyte meiotic resumption and promotes glycolysis.〔 In addition, it provides protection for the oocyte.〔 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「cumulus oophorus」の詳細全文を読む スポンサード リンク
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