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

List one body structure that the germ layer at “C” (yellow)…

Identify the structure at “C”.

17. Identify the specific tubes at letter G.

    15. Identify a specific hormone secreted by letter A.

16. Identify the specific structure at letter E. 

        15. Identify a specific hormone that directly affect…

20. What is specifically contained in region F?

19. Identify the specific number of chromosomes in letter B.

Identify the structure indicated by “A”.  (Be specific)