Is the area at “B” filled with fetal blood or maternal blood?

Identify the mature structure at “C”.

Identify the fluid structure indicated by “E” 

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

Identify the area at “B”.  Be specific.

Properly identify the area labeled  “D”

What is the function of the structure at “C”?

Properly identify the structure labeled  “E”

Name the cell indicated by arrow “B” 

The structure at the arrow labeled “D” encloses a region called the _______________.