Pregnancy And Embryonic Development

The correct Option is : 1

Human embryonic development progresses through several well-defined stages:

Morula: A solid ball of cells resulting from the division of a fertilized egg.

Blastocyst: The morula develops a fluid-filled cavity, differentiating into the inner cell mass and the trophoblast.

Gastrulation: Formation of the three germ layers (ectoderm, mesoderm, endoderm) begins.

Neurulation: Development of the neural tube, which will eventually form the central nervous system.

Sequence of Stages:

Conclusion: The correct order of human embryo development stages is Morula, Blastocyst, Gastrulation, and Neurulation.