(10) Examine the wall of the duct in injected and uninjected material, both stained.
(11) Follow the bloodvessels—can you find nerves on the walls of arteries?
(12) Of what structure do you find the root of a little lobule to consist?
(13) How do the nerve trunks differ from the fibrous envelope holding together all these structures?
(14) Differentiate between the nuclei of the nerve fibres and the nuclei of the nerve sheath.
(15) Examine nerve branches of various thicknesses—what do you find the nature of the nerve fibres to be? Do not forget the aniline blue and try other staining fluids.
(16) Can you find evidence in the alveoli of other structures besides capillary, membrana propria and salivary cells?
(17) How far have you succeeded in following the fine nerve twigs?
(18) By all means try different methods, different tissue, and compare the results. See what you can discover by simply teasing material treated with Muller’s fluid, and other stained and treated as I have described.
(19) Follow the course of the arteries, and note where the larger vessels pass into the capillaries.