The regions labeled 3 and 4  together make up what layer of…

Name the hormone produced by the organ at pointer A that con…

Name the cell indicated by “D” 

Name the cells that form the structures labeled A and B.

Identify the structure at “A”.  

Identify the structure indicated by arrow “D”.  (Be specific…

 Identify the specific process  indicated at letter A.

Name one hormone produced by the organ indicated by “A” 

Identify the REGION indicated by box B

In humans, what is the function of the structure at “A”?