Across
- 10. process of separation of group of cells from others to form discrete cellular masses.
- 11. this phenomenon is opposite to convergence,when involuted cells diverge to take up their future positions inside gastrula.
- 12. increase in the number of cells during gastrulation is
- 13. this type of blastula is formed in mammals by regular cleavage
- 14. The throwing in or insertion of cells is
- 15. it constitutes the roof of blastula
Down
- 1. it is a phase early in the embryonic development of most animals.
- 2. it is the process which split zygote or fertilized egg into smaller cells
- 3. inside of the blastula becomes a hollow fluid -filled space called.
- 4. it denotes the infolding of a layer of cells to form a cavity encircled by infolded cells.
- 5. the elongation of presumptive areas after they have moved inside the embryo is called
- 6. during early cleavage stages the blastomeres form the structure of embryonic stage called
- 7. it is formed in insect eggs due to superficial cleavage
- 8. it is the process by which the morula becomes a blastula .
- 9. this type is formed due to spiral cleavage .