Transport of thermal energy across the organization centre of chick embryo

Summary

• 1. Transit of heat from three selected points across the blastoderm has been analysed.

• 2. The shock at the differentiating centre is more drastic than that at a point away from it.

• 3. The posterior and the middle portion of the embryo are more susceptible than the anterior portion of the same to the thermal shock.

• 4. Graded types of ontogenesis have been observed after thermal treatment.

• 5. The epiblast is the most susceptible layer to heat treatment than the other two.

• 6. Different aspects of the abnormal morphogenesis have been explained from the point of view of morphogenetic movement of cells.