Place the following events of human early development in the correct order.
A) Early cleavage, gastrulation, implantation, organogenesis, rapid growth
B) Early cleavage, implantation, gastrulation, organogenesis, rapid growth
C) Implantation, early cleavage, gastrulation, rapid growth, organogenesis
D) Gastrulation, implantation, early cleavage, rapid growth, organogenesis
E) Early cleavage, gastrulation, organogenesis, implantation, rapid growth

Question

Quizplus · Accepted Answer

The correct order of events in human early development is:

1. Early cleavage: The fertilized egg undergoes a series of rapid cell divisions, forming a ball of cells called a blastula.

2. Implantation: The blastula attaches to the uterine lining and starts to embed itself in the tissue.

3. Gastrulation: The cells in the blastula begin to differentiate and form distinct layers, which will give rise to different body tissues and organs.

4. Organogenesis: The cells continue to differentiate and form specific organs, such as the heart, brain, and liver.

5. Rapid growth: The fetus undergoes a period of rapid growth and development, increasing in size and complexity.

Therefore, the correct order of events is B: Early cleavage, implantation, gastrulation, organogenesis, rapid growth.

Place the Following Events of Human Early Development in the Correct