Question: During embryonic development which of the following is formed first?
A Heart
B Brain
C Neural tube
D Skin
Answer: Neural tube
| Embryonic Development Stage | Description |
| Gastrulation | · During gastrulation, three germ layers namely endoderm, mesoderm and ectoderm are formed · notochord is formed |
| Neural Plate Formation | · The notochord, which is mesodermal in origin, causes the overlying ectoderm to roll and form the neural plate. · The neural plate is a plate-like structure that develops from the ectoderm and lies above the notochord. |
| Neural Tube Formation | · The neural plate then rolls inward, forming a tube-like structure known as the neural tube. · The neural tube is the first organ to develop in the embryo and serves as the foundation for the central nervous system. |
| Development into Brain and Spinal Cord | · The neural tube further differentiates and gives rise to the brain and spinal cord during subsequent stages of embryonic development. |