An embryologist interested in studying the morphogenetic movements in chick embryo, during 3 cells layer stage of the embryo, added some vital stains as embryonic fate markers (embryonic fate markers usually stain the cells and in future development of embryo the stained cells differen tiate into developing organ. Thus the movement of the cell can be traced). He gave the upper layer green colour, middle layer orange and innermost layer blue.
a. Name the 3 layers mentioned above.
b. Based on your knowledge regarding the development of an embryo predict three organs with these respective colours.

Explanation

a. Ectoderm - green colour
Mesoderm - orange colour
Endoderm- blue colour
b. Ectoderm - Brain, Skin, Spinal cord
Mesoderm - Blood, Muscles, Kidney
Endoderm - Gut, Liver, Pancreas