Question

Which of the following correctly lists the stages of human embryo development in order?

• A. Morula, Blastocyst, Gastrulation, Neurulation
• B. Blastocyst, Morula, Neurulation, Gastrulation
• C. Neurulation, Gastrulation, Morula, Blastocyst
• D. Gastrulation, Neurulation, Blastocyst, Morula

Hint:

Understanding the stages of embryonic development is fundamental in fields like developmental biology and medicine, as it provides insights into normal and abnormal growth patterns.

Answer 1

The Correct Option is A

Correct Option: 1

Human embryonic development follows a sequential order of stages:

Morula: A solid cellular aggregate derived from a zygote's mitotic divisions.

Blastocyst: The morula transforms, forming a fluid-filled cavity and differentiating into an inner cell mass and an outer trophoblast.

Gastrulation: This stage marks the initiation of the three primary germ layers: ectoderm, mesoderm, and endoderm.

Neurulation: The neural tube, the precursor to the central nervous system, begins to form.

Developmental Sequence: \[ \text{Morula} \rightarrow \text{Blastocyst} \rightarrow \text{Gastrulation} \rightarrow \text{Neurulation} \] 

Summary: The stages of human embryonic development, in their correct chronological order, are Morula, Blastocyst, Gastrulation, and Neurulation.