n.原肠（胚）形成

Gastrulation marks the crucial stage in embryonic development where three primary germ layers form: ectoderm, mesoderm, and endoderm.
胚胎发育中的 gastrulation阶段标志着三个主要胚层（外胚层、中胚层和内胚层）的形成。
The process of gastrulation is essential for the proper formation of organs and body structures in vertebrates.
胃肠化过程对于脊椎动物器官和身体结构的正确形成至关重要。
During gastrulation, the blastomeres differentiate into cells that will later become the neural tube, heart, and gut.
在胃肠化过程中，卵裂球分化成将来的神经管、心脏和消化道细胞。
Scientists study gastrulation to understand how early embryos establish their body plan.
科学家通过研究胃肠化来理解早期胚胎如何建立其身体结构。
Abnormalities in gastrulation can lead to birth defects such as neural tube defects or heart malformations.
胃肠化异常可能导致出生缺陷，如神经管缺陷或心脏畸形。
Researchers have developed models to simulate gastrulation in vitro, advancing our knowledge of this complex developmental process.
研究人员已经开发出模拟体外胃肠化的模型，以深化我们对这一复杂发育过程的理解。
Invertebrates undergo a simpler version of gastrulation, where the three germ layers fuse together without the formation of a distinct neural tube.
无脊椎动物经历的胃肠化版本较为简单，三个胚层直接融合，没有形成明显的神经管。
Understanding gastrulation is critical for developing effective treatments for diseases related to early embryonic development.
对胃肠化的理解对于研发针对早期胚胎发育相关疾病的治疗方法至关重要。
Comparative studies on gastrulation across different species provide insights into evolutionary history and common ancestry.
不同物种的胃肠化比较研究揭示了进化历史和共同祖先的信息。
Gastrulation occurs during the first week of mammalian pregnancy, setting the foundation for the entire embryo's future growth and development.
在哺乳动物怀孕的第一周，胃肠化发生，为整个胚胎的未来生长和发育奠定了基础。