Name structures circled and labeled “A”.

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

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

Identify the space indicated by arrow “D”.

Identify the specific tubular structures at letter B.

Name the cells indicated by “A” 

Identify the tissue structure indicated by arrow “A” 

 Identify the specific tubes at letter G.

Identify the space indicated by arrow “B”.

Identify the developmental stage in the picture above.