Identify layer “D”.

What is the function of the area labelled A?

Identify the component of a reflex arc at “D”.

What is the function of the structure indicated by arrow B? 

The spinal nerves at “A” are from the _____________________________ region.

  Name the structures labelled C.

Identify the space at “A”.

Identify the component of a reflex arc at “C”.

Identify the structure at arrow E

Identify the type of cell at Arrow B.