extraembryonic

简明释义

英[ˈekstrəˌembrɪˈɒnɪk]美[ˈekstrəˌembraɪˈɑnɪk]

adj. 胚胎外的

英英释义

单词用法

同义词

反义词

例句

1.The hematopoietic and vascular systems of the mouse arise from extraembryonic mesoderm that migrate through primitive streak to the presumptive yolk sac between days 6.5 and 7.0 of gestation.

小鼠的造血和血管系统起源于胚外中胚层。胚胎期6.5-7天时在卵黄囊形成特征性的血岛结构发生向造血和内皮细胞的分化。

2.The hematopoietic and vascular systems of the mouse arise from extraembryonic mesoderm that migrate through primitive streak to the presumptive yolk sac between days 6.5 and 7.0 of gestation.

小鼠的造血和血管系统起源于胚外中胚层。胚胎期6.5-7天时在卵黄囊形成特征性的血岛结构发生向造血和内皮细胞的分化。

3.Totipotent - having unlimited capability. Totipotent cells have the capacity to specialize into extraembryonic membranes and tissues, the embryo, and all postembryonic tissues and organs.

全能？具有无限能力。全能细胞具有分化为特定的胚胎外膜和组织、胚胎以及所有胚胎后组织和器官的能力。

4.Totipotent - having unlimited capability. Totipotent cells have the capacity to specialize into extraembryonic membranes and tissues, the embryo, and all postembryonic tissues and organs.

全能—具有无限能力。全能细胞具有分化为特定的胚胎外膜和组织、胚胎以及所有胚胎后组织和器官的能力。

5.Ultrasonography had great advantage over MRI in showing yolk sacs, amniotic sacs, extraembryonic coelom and embryocardia-beats ( P< 0.005).

MRI显示早早孕、早中期的卵黄囊、胚外体腔、羊膜囊及胎心搏动不如超声（P<0 .0 0 5 ） ；

6.Tetraploid cells are preferentially allocated to the extraembryonic tissues, such as placenta, rather than the fetus itself.

而在胎儿本身的组织中，很少能找到四倍体细胞的存在。

7.Extraembryonic mesoderm migrates through primitive streak to the presumptive yolk sac between days 6.5 and 7.0 of gestation.

胚外中胚层在妊娠的第6.5至7.0天之间通过原始条带迁移到推测的卵黄囊。

8.The study focused on the development of extraembryonic 胚外的 tissues in early mammalian embryos.

这项研究集中在早期哺乳动物胚胎中extraembryonic 胚外的 组织的发育上。

9.Researchers discovered that extraembryonic 胚外的 membranes play a crucial role in nutrient exchange.

研究人员发现，extraembryonic 胚外的 膜在营养物质交换中起着关键作用。

10.In chickens, the extraembryonic 胚外的 structures are essential for gas exchange during development.

在鸡中，extraembryonic 胚外的 结构对发育过程中的气体交换至关重要。

11.The placenta is derived from extraembryonic 胚外的 tissues that support fetal development.

胎盘来源于支持胎儿发育的extraembryonic 胚外的 组织。

12.Scientists are investigating how extraembryonic 胚外的 factors influence embryonic stem cell differentiation.

科学家们正在研究extraembryonic 胚外的 因素如何影响胚胎干细胞的分化。

作文

The development of an organism is a complex process that begins with the fertilization of an egg and continues through various stages until maturity. One of the critical aspects of this development involves structures that are not part of the embryo itself but are essential for its growth and survival. These structures are referred to as extraembryonic (胚外的) tissues. Understanding the role of extraembryonic (胚外的) components is crucial for comprehending how embryos develop in different species, including humans. In mammals, the extraembryonic (胚外的) membranes include the amnion, chorion, yolk sac, and allantois. Each of these membranes serves a specific function during prenatal development. For instance, the amnion provides a protective fluid-filled cavity that cushions the developing embryo, while the yolk sac is involved in early nutrient transfer before the placenta is fully formed. The chorion plays a vital role in gas exchange and eventually forms part of the placenta, which is crucial for supplying oxygen and nutrients to the embryo. The allantois also contributes to waste management and gas exchange. The significance of extraembryonic (胚外的) structures extends beyond mere support; they also play a role in regulating the environment in which the embryo develops. For example, the amniotic fluid within the amnion not only protects the embryo but also helps maintain a stable temperature and allows for movement, which is important for musculoskeletal development. Furthermore, extraembryonic (胚外的) tissues can influence the immune response, ensuring that the maternal body does not reject the developing fetus as a foreign object. Interestingly, research into extraembryonic (胚外的) tissues has implications for various fields, including regenerative medicine and developmental biology. By studying how these tissues function and interact with the embryo, scientists can gain insights into potential treatments for infertility or developmental disorders. For instance, understanding the mechanisms behind placental formation can lead to better management of conditions such as preeclampsia, which affects the health of both the mother and the fetus. Moreover, the study of extraembryonic (胚外的) tissues is not limited to mammals. In birds and reptiles, the extraembryonic (胚外的) membranes perform similar functions, albeit in a different context due to the eggs' environment. This comparative approach can help researchers understand evolutionary adaptations in reproductive strategies across species. In conclusion, the term extraembryonic (胚外的) refers to the structures that support and protect the embryo during its development. These tissues are essential for providing nourishment, facilitating gas exchange, and protecting the embryo from external threats. Understanding the role of extraembryonic (胚外的) components not only enhances our knowledge of embryonic development but also opens avenues for medical advancements. As we continue to explore the complexities of life at its earliest stages, the significance of extraembryonic (胚外的) structures will undoubtedly remain a focal point of scientific inquiry.

有机体的发展是一个复杂的过程，从卵子的受精开始，经过各个阶段直到成熟。这个发展中的一个关键方面涉及不属于胚胎本身但对其生长和生存至关重要的结构。这些结构被称为extraembryonic（胚外的）组织。理解extraembryonic（胚外的）成分的作用对于理解不同物种，包括人类的胚胎如何发育至关重要。 在哺乳动物中，extraembryonic（胚外的）膜包括羊膜、滋养层、卵黄囊和尿囊。这些膜在产前发育过程中各自发挥着特定的功能。例如，羊膜提供了一个充满液体的保护腔，缓冲正在发育的胚胎，而卵黄囊则在胎盘完全形成之前参与早期的营养转移。滋养层在气体交换中起着至关重要的作用，并最终形成胎盘的一部分，胎盘对于向胚胎供应氧气和营养至关重要。尿囊也有助于废物管理和气体交换。 extraembryonic（胚外的）结构的重要性不仅限于提供支持；它们还在调节胚胎发育环境中发挥作用。例如，羊膜内的羊水不仅保护胚胎，还帮助维持稳定的温度并允许运动，这对肌肉骨骼的发育很重要。此外，extraembryonic（胚外的）组织可以影响免疫反应，确保母体不会将发育中的胎儿视为外来物体而拒绝它。 有趣的是，研究extraembryonic（胚外的）组织对各个领域都有影响，包括再生医学和发育生物学。通过研究这些组织的功能及其与胚胎的相互作用，科学家可以深入了解不孕症或发育障碍的潜在治疗方法。例如，了解胎盘形成背后的机制可以导致更好地管理妊娠高血压等影响母婴健康的情况。 此外，extraembryonic（胚外的）组织的研究不限于哺乳动物。在鸟类和爬行动物中，extraembryonic（胚外的）膜在不同的环境中执行类似的功能。这种比较方法可以帮助研究人员理解不同物种在生殖策略上的进化适应。 总之，extraembryonic（胚外的）一词指的是支持和保护胚胎在其发育过程中的结构。这些组织对于提供营养、促进气体交换和保护胚胎免受外部威胁至关重要。理解extraembryonic（胚外的）成分的作用不仅增强了我们对胚胎发育的知识，也为医学进步开辟了途径。随着我们继续探索生命最早阶段的复杂性，extraembryonic（胚外的）结构的重要性无疑将继续成为科学研究的焦点。