Definition

1. Noun (Biology, Embryology):
   • Blastula: An early stage of embryonic development in animals, following the morula stage. It is typically a hollow sphere of cells (blastomeres) surrounding a fluid-filled cavity called the blastocoel.

Usage Examples

• Noun:
  • Sự hình thành phôi nang là một bước quan trọng trong quá trình phát triển phôi thai. (The formation of the blastula is an important step in embryonic development.)
  • Ở giai đoạn phôi nang, các tế bào bắt đầu biệt hóa. (At the blastula stage, the cells begin to differentiate.)

Advanced Usage

• In developmental biology, the study of the phôi nang is crucial for understanding gastrulation, the next stage where the embryo forms distinct germ layers.

Variants and Related Words

• Phôi (n): embryo.
• Phôi dâu (n): morula (the developmental stage preceding the blastula).
• Phôi vị (n): gastrula (the developmental stage following the blastula).

Synonyms

• Blastula: The direct scientific synonym in English.

Related Terms (Not Synonyms)

• Blastocyst: In mammalian development, this is a specific and more complex structure analogous to the blastula, featuring an inner cell mass and trophoblast. It is not a perfect synonym for phôi nang in all animal species.