Identify the specific structure at letter E. 

Is the blood in “A” flowing towards the placenta or towards the fetus?

Identify the process that is happening at the large blue arrow

 Identify the specific cell clusters at letter C.

 Identify the specific tube at letter B.

Name one function of structure labeled “B”.

Identify the specific tubes at letter A.

    Identify a specific hormone secreted from the organ represented by letter A.

  Give one function of structure labeled “A”.  

Identify the phase of the lining of the organ demonstrated in the image above.