In the Martian video: What is Mark’s specialty in science?

Which of the following structures is the largest?

Essentially all the elements heavier than iron in our galaxy were formed:

                                                    48. Name the structure the red arrow is pointing to?

                                                          18.  Please identify the white covering on this brain? What do we call it?

                                                          30. Name the  muscle the black arrow is pointing to?

                                                                          40. Name the structure the red line is located in?

                                                                                      9. Name the structures the  black arrows are pointing to?

                                                                  46. Name the origin, insertion and action of this muscle numbered # 11?    

                                                      6. Please name the letter “H” on the diagram?