Name the cell indicated by arrow “B” 

List one body structure that the embryonic germ layer at “A” (white) gives rise to.

Identify the structure indicated by “B”

Properly identify the area labeled  2

What is specifically contained in letter D?

Identify the structure at “A”.  

Identify layer “B”.  

Properly identify the area labeled  “C”

Name the cells that form the structure labeled  “E”

Name the hormone responsible for the activity demonstrated in the image above.