【龙腾网】医学动画：《精子卵子一相逢》
正文翻译
原创翻译：龙腾网 http://www.ltaaa.com 翻译：洋芋就是土豆儿 转载请注明出处
----背信不雅欠达意警告----
Fertilization is the epic story of a single sperm facing incredible odds
受精是一个蝌蚪面临着难以想象的困难的史诗故事
To unite with an egg and form a new human life it is the story of all of us
与卵子结合，形成一个新的人类生命，这也是我们人类的故事
During sexual intercourse about 300 million sperm enter the vagina
在性交过程中大约有3亿蝌蚪进入阴道内
Soon afterward millions of them will either flow out of the vagina
不久，数百万蝌蚪要么流出阴道
or die in its acidic environment
要么在酸性环境中死掉
Inside the uterus muscular uterine contractions assist the sperm on their journey Toward the egg
明确的是：子宫肌肉收缩可以帮助蝌蚪游向卵子
However resident cells from the women''s immune system mistaking the sperm for foreign invaders, destroy thousands more
然而，女性的免疫细胞将蝌蚪误认为是外来侵略者，于是后者成千上万地卒死
Next half the sperm head for the empty Fallopian Tube while the other half swim toward the Tube containing the unfertilized egg
接下来，一斗向左一半向右，右边的输卵管空荡荡
now
现在
only a few thousand remain
只剩下几千条好汉了
Inside the Fallopian Tube tiny cilia pushed the egg toward the Uterus
花开两朵各表一枝：镜头切到输卵管内，小纤毛将卵推向子宫
To continue the sperm must surge against this motion to reach the egg
蝌蚪不得不逆着纤毛摆的方向涌向卵子
Some sperm get trapped in the cilia and die
一些蝌蚪会被困在纤毛中卒死
Which triggers their acrosomes to release digestive enzymes
此举触发了它们的顶体释放消化酶
enabling the sperm to burrow into the layer
方便蝌蚪钻入透明带内层
Inside the Zona Pellucida is a narrow fluid filled space just outside the egg cell membrane
那是一个狭窄的充满液体的空间，就附着在卵子的细胞膜的外缘
The first sperm to make contact will fertilize the egg
此时唯有冠军蝌蚪能如愿以偿与卵子合体
After a perilous journey and against incredible odds a single sperm attaches to the egg cell membrane
历经此段危险的旅程，冠军蝌蚪终于附着在卵子的细胞膜上了
Within a few minutes their outer membranes fuse and the egg pulls the sperm inside
几分钟的时间里，它俩的外膜融合，卵子更将蝌蚪吸入体内
This event causes changes in the egg Membrane that prevent other sperm from attaching to it
此次融合将导致卵子膜发生变化，排斥其他蝌蚪与她合体
Next the egg releases chemicals that push other sperm away from the egg
紧接着，卵子将释放化学物质，将其他蝌蚪推开
and create an impenetrable fertilization membrane
并形成一张难以穿透的受精膜
As the reaction spreads outward the Zona Pellucida hardens trapping any sperm unlucky enough to be caught inside
当此反应向外扩散时，透明带就会硬化，把所有不幸的蝌蚪困住
Outside the egg, sperm are no longer able to attach to the Zona, Pellucida
卵子蛋的外面，蝌蚪们再无能够附着在透明带上了
Meanwhile inside the egg the tightly packed male genetic material spreads out
同时在卵子蛋内部，紧密堆积的雄性遗传物质扩散开来
a new Membrane forms around the genetic material creating the male pronucleus
一张新的膜在遗传物质周围形成，即雄性原核
Inside the genetic material reforms into 23 chromosomes
原核内遗传物质转化成23条染色体
the female genetic material awakened by the fusion of the sperm with the egg finishes dividing
冠军蝌蚪与卵子蛋的融合唤醒了雌性遗传物质的分裂
resulting in the female pronucleus which also contains 23 chromosomes
导致雌性原核也含有23条染色体
and now the cilia and the Fallopian Tube gently sweep the Zygote toward the uterus
此刻纤毛和输卵管将受精卵轻扫进子宫深处着床
Where he or she will implant in the richer uterine lining
他或她将在营养物质更丰富的子宫内膜着床
Growing and maturing for the next nine months until ready for birth
在接下来的九个月里发育成熟，直到降生
