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. |
