Saved Bookmarks
| 1. |
Development of embryo from unfertilization egg is |
|
Answer» The fertilized egg (zygote) begins todevelop into a hollow ball of CELLS called the blastocyst. The blastocyst IMPLANTS in the wall of uterus. The area that will become the BRAIN and spinal cord (neural TUBE) begins to develop. The heart and major blood vessels are developing. |
|