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ootid
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ootid
ootid Biol. (ˈəʊətɪd) [f. oo- after spermatid.] A haploid cell formed by the division of a secondary oocyte; by some writers restricted to the ovum, as contrasted with the polar body.1908 F. R. Lillie Devel. of Chick 14 The mature ovum (oötid) and the polar bodies are the precise equivalent of the f...
Oxford English Dictionary
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Oogenesis
Ootidogenesis
The succeeding phase of ootidogenesis occurs when the primary oocyte develops into an ootid. When meiosis II has completed, an ootid and another polar body have now been created. The polar body is small in size.
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oocyte
oocyte Biol. (ˈəʊəsaɪt) [f. oo- + -cyte, as ad. G. ovocyte (now oozyte) (T. Boveri 1892, in Anat. Hefte Abt. II. I. 446): see ovo-.] An egg mother-cell, which gives rise to a mature ovum by meiosis; the primary oocyte gives rise in meiosis I to the secondary oocyte and a small polar body; the second...
Oxford English Dictionary
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Immature ovum
It can be an oogonium, an oocyte, or an ootid. Ootid
An ootid is the haploid result of ootidogenesis.
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polocyte
polocyte Biol. (ˈpəʊləʊsaɪt) [f. pole n.2 + -o + -cyte.] = polar body s.v. polar a. 5.1915 C. W. Prentiss Lab. Manual & Text-bk. Embryol. i. 28 The cleavage is unequal and, instead of four cells of equal size resulting, there are formed one large ripe ovum or oöcyte and three rudimentary or abortive...
Oxford English Dictionary
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polar
polar, a. (n.) (ˈpəʊlə(r)) [ad. med.L. polār-is, f. L. pol-us pole n.2: see -ar1. Cf. It. polare (c 1300 in Dante), Sp. polar, F. polaire (1556 in Hatz.-Darm.).] A. adj. 1. Astron. and Geog. Of or pertaining to the poles of the celestial sphere or of the earth; situated near or connected with either...
Oxford English Dictionary
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Folliculogenesis
It will develop into an ootid, and rapidly thereafter into an ovum (via completion of meiosis II) only upon fertilization.
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Menstrual cycle
If it is fertilized by a sperm, the oocyte promptly matures into an ootid, which blocks the other sperm cells and becomes a mature egg.
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Fish anatomy
The primary oocyte divides and produces the secondary oocyte as well as a polar body, before the secondary oocyte develops into the haploid ootid.
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卵子生成
卵细胞生成
卵细胞生成(ootidogenesis)包括了从初级卵母细胞发育形成未成熟卵细胞(ootid)的过程,透过减数分裂来完成。事实上,在生物学的定义上,一个初级卵母细胞的主要功能是进行减数分裂。
然而,尽管这个过程在出生前就完成了,他会停止在第一次减数分裂的前期(Prophase I)。 当第二次减数分裂完成后,未成熟卵细胞(ootid)及其他的极体会生成。
滤泡生成
滤泡生成(Folliculogenesis)会与卵细胞生成同时进行,滤泡会围绕在未成熟卵细胞的周边,从原始滤泡直至排卵前。
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