The formation of mesoderm:
- Mesoderm refers to one of the three germ layers of an embryo that develops during gastrulation.
- It is found to be present between the ectoderm and endoderm in the early embryo.
- In the early developmental stage, the egg possesses a darker animal region and a yolky vegetal region.
- Future mesoderm cells develop from animal region cells at the boundary of these two regions as an equatorial band.
- These future mesoderm cells are found on the surface in the early blastula.
- During gastrulation, the cells will rearrange until the mesoderm (and endoderm) are on the inside of the embryo.
- The mesoderm cells migrate to the interior.
- The central nervous system, excretory system, digestive system, and reproductive system are formed from the mesoderm layer.