Identify the layer indicated by arrow B

  Identify the structure labeled “D” 

Identify the bone marking at D.

Name the cranial nerve that supplies the muscle labeled “A”…

Name the fluid found within the structure at Arrow C.

Identify the structure labeled ” E “

Name a cranial nerve that innervates this organ

What is the function of the structures indicated by arrows A…

Identify the bone seen in this image.  

What is the function of the structure labelled B?