Identify the organ at the arrow

Identify the structure (red) at “A”.

Properly identify the stage labeled  “F”

Identify the structure indicated by “C”

Properly identify the stage labeled  “A”

Properly identify the stage labeled  “K”

   Name the MAIN hormone responsible for this phase of the u…

  Identify the cortical area labeled “A”.  

Identify the organ at pointer/arrow A.

Does the structure at “B” contain fetal or maternal blood?