List one body structure that the embryonic germ layer at “C” (yellow) gives rise to.

Identify the are at “B”.  Be specific.

Identify the process that is happening at the arrow

 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.