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?

Identify the extraembryonic membrane at “B”.

Properly identify the stage labeled  “E”

Name the cell indicated by “D” 

Properly identify the stage labeled  “K”

Identify the structure indicated by “C” 

Identify the embryonic germ layer (green) at “B”.