- 更多网络例句与后原肠胚相关的网络例句 [注：此内容来源于网络，仅供参考]
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The outer layer of a blastula that gives rise to the ectoderm after gastrulation.
外胚层囊胚的外层，在原肠胚形成之后生后外胚层组织
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The formation of a gastrula from a blastula by invagination.
外胚层囊胚的外层，在原肠胚形成之后生后外胚层组织
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In addition, using RT-PCR to detect expression of centrin homogene during Urechis unicinctus spermatid deferentiation and early embryonic development. The result revealed that (1) expression of HsCEN1 homogene is present during spermatid defferentiation including spermtid and sperm, but not in adult tissues including body wall tissue,intestinal mucous memberane cells and cell in coelom succus;(2) expression of HsCEN1 homogene is not present in unfertilized oocytes but present in that of released polar bodies after fertilization and parthenogenesis oocytes treated with A23187;(3) expression of HsCEN1 homogene is present during early embryonic development including two-cell stage,multicell stage,gastrula to trochophora.
我们还用RT-PCR方法检测了Centrin同源基因在单环刺螠精子分化过程和早期胚胎发育过程的表达，结果显示：在单环刺螠精子发生过程中的精细胞、精子团、精子中都有表达，而在成体的体壁组织、消化道组织、体腔球中则没有表达；在未受精卵中没有表达，而在受精后释放极体的受精卵和经A23187孤雌激活的卵中则有表达；在单环刺螠的早期发育过程——二细胞胚胎、多细胞胚胎、原肠胚、早期担轮幼虫——中都有表达。
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This suggests that CaHIRA plays a role in the early embryo development and the late stages. The different expression characters of hira gene in these fish species may be related to the different reproduction models. The research on Drosophila has indicated hira gene related to sperm nucleus decondensation during fertilization. The high expression of hira gene before fertilization is prepared for the sperm nucleus decondensation and the formation of male prenucleus because colored crucian carp is bisexual reproduction. However, the sperm nucleus is not decondensated during the fertilization and is only to activate egg nucleus in gynogenetic gibel carp.
在彩鲫中，从未受精卵到胚胎发育的各个时期均可检测到表达，但表达量发生明显变化，受精后表达量迅速下降，直到原肠胚期表达量有所上升，并一直保持到出苗。hira基因在两亲缘种成熟卵子受精前后表达情况不同，可能与两种鱼不同的生殖方式有关。
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The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.
外胚层囊胚的外层，在原肠胚形成之后生后外胚层组织
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It showed that in conditions of water temperature 20～21℃,salinity 20～30,pH 8.0～8.3,the fertilized eggs developed to 2-cell in about 2h,blastula stage in about 15h,gastrula stage 30h and the hatched out larva 152h after fertilization.
其结果表明：在水温20-21℃、盐度20-30、pH值8.0-8.3的条件下，受精卵受精后2h为2细胞期、15h为囊胚期、30h为原肠期、55h为胚体期、152h孵出仔鱼
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" During the second week following fertilization, gastrulation (cell differentiation and migration ) results in the formation of three tissue types."
受精之后第二周，原肠胚形成后，胚胎分化为三个组织类型
- 更多网络解释与后原肠胚相关的网络解释 [注：此内容来源于网络，仅供参考]
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ectoderm：外胚层
此时胚胎具备内外两层细胞,贴着原肠腔的一层细胞,称内胚层(endoderm),与外界相接触的一层细胞,称为外胚层(ectoderm),此阶段称原肠胚(gas- trula). 以后胚胎逐渐延长,原口逐渐缩小,此时胚胎的前、后、背、腹已能区别.
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primitive endoderm：原始内胚层
内细胞团形成后,首先分化成原始内胚层(primitive endoderm),接着分化形成外胚层(epiblast)的生殖层(germlayer),它是未来男、女性生殖细胞的前体. 随着胚胎发育,这些细胞迁移至生殖嵴. 当原肠胚形成(gastrulation),ICM分化多能性消失,
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intestine：肠
采集牙鲆不同发育时期的胚胎样品,依次为受精后:4小时(2-8细胞期)、20小时(原肠期)、36小时(神经胚期)、44小时(肌节期)、52小时(尾芽期)、68小时(心跳期)、80小时(鱼苗期);采集牙鲆成鱼肝脏(Liver)、脾脏( leen)、小肠(Intestine)、鳃(Gill)、
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organogenesis：器官形成
胚胎发育包括受精、卵裂(cleavage)、原肠胚形成(gastrulation)、神经胚形成(neurulation)、器官形成(organogenesis)等几个主要的发育阶段,许多动物还必须经过胚后发育阶段--变态(metamorphosis),才能发育为成体.
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exocoelom：胚外体腔
羊膜卵的胚胎发育到原肠期后,在胚体周围发生向上隆起的环状皱褶--羊膜绒毛膜褶,不断生长的环状皱褶由四周逐渐往中间聚拢,彼此愈合和打通后成为围绕着整个胚胎的2层膜,即内层的羊膜和外层的绒毛膜,两者之间是一个宽大的胚外体腔(exocoelom).
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gastrulation：原肠胚形成
胚胎发育包括受精、卵裂(cleavage)、原肠胚形成(gastrulation)、神经胚形成(neurulation)、器官形成(organogenesis)等几个主要的发育阶段,许多动物还必须经过胚后发育阶段--变态(metamorphosis),才能发育为成体.
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Metabola,Metamorphosis：变态,完全变态
中轮幼虫 Mesotrochal larva | 变态,完全变态 Metabola,Metamorphosis | 后原肠胚 Metagastrula
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metagastrula：后原肠胚
04.0250 原肠外凸 exogastrulation | 04.0251 后原肠胚 metagastrula | 04.0252 胚层前期 pregermlayer stage
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Metagastrula stage：后原肠期
后原肠胚 Metagastrula | 后原肠期 Metagastrula stage | 世代交替 Metagenesis,Alternation of generation,Heterogamy,Heterogony,Heterogenesis
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protostome：原口动物
它们与原口动物(protostome)不同的是:在胚胎发育中的原肠胚期,原口(胚孔)形成动物的肛门,而在与原口相对的一端,另形成新口称为后口. 以这种方式形成口的动物,称为后口动物. 因此棘皮动物与大多数无脊椎动物不同,