intraembryonic coelom

例句：

1. 1. The embryonic coelom is a crucial structure in the development of the human fetus.
   胚胎内腔是人胎儿发育过程中至关重要的结构。
2. 2. The study of embryonic coelom has significant implications for understanding human development.
   研究胚胎内腔对于理解人类发展具有重要意义。
3. 3. During early embryonic development, the coelom acts as a sac to protect and nurture the developing embryo.
   在早期胚胎发育过程中，内腔起到保护和滋养胚胎的作用。