Identify the structure (red) at “A”.

  Identify the organ at the arrow

Properly identify the stage labeled  “D”

Identify the mature structure at “C”.

Identify the area at “B”.

Identify the area at “A”.

Properly identify the stage labeled  “B”

Identify the structure (blue) at “A”.

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

Identify the organ at pointer/arrow A.