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

  What is produced by the cortical area labeled “A”

Identify the process that is happening at the large blue arr…

Identify the REGION indicated by box A that contains blood s…

Identify the structure indicated by “A”

Identify the specific tubes at letter A.

Identify the developmental stage of embryogenesis at the poi…

Name the cells indicated by “A” 

Identify the process that is happening at the blue arrow

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