#617 is pointing to an opening/tube-like structure. What is the name of this structure?

Name the hole/opening labeled #5

Name the tissue above. Make sure to be specific and use the full name. 

Name the “red” bone or the red region of this model. Do not include red in your response. 

Name the “yellow” area or the area labeled #603

Name the structure/area labeled #3

Name the “red” bone or the red region of this model. Do not include red in your response. 

Identify the structure labeled #38

Name the tissue above. Make sure to be specific and write the full name of the tissue. 

Name the structure labeled Letter D. You do not have to determine the region.