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 _______________.

Identify the embryonic germ layer (white) at “A”.

Properly identify the stage labeled  “F”

Identify the entire structure labeled  “C”

   Name the MAIN hormone responsible for this phase of the uterine lining seen here

Name the cells indicated by “B” 

   What is the specific function for the substance contained in letter E?