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

Identify the REGION of the organ indicated by “A”.

  Name structures circled and labeled “A”.

Identify the layer of the organ indicated by arrow “C”.

Identify the structures indicated by the arrows.    

 Identify the specific cell at letter B.

Identify the process that is happening at the arrow

  Name structure labeled “A”.

Identify the process that is happening at letter B

  Identify a specific hormone secreted by letter A.