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

Identify the area indicated by “B”.  (Be specific)

Identify the process that is happening in the area circled above

Identify the specific cell at B.  

Identify the space indicated by arrow “C”.

Identify the specific tissue/structure indicated by arrow “B” 

 Identify the specific tubes at letter B.

     Identify the specific cortical  region is indicated by”C”.

Identify the specific substance contained in letter E.

 Identify the specific tubes at letter D.