Total Magnification: 100x
Key:
IEM: Internal Elastic Membrane
TA: Tunica Adventitia
SM: Smooth Muscle
EF: Elastic Fibers
Histo-Tips: When picking up a tissue ribbon after sectioning, do not grab the ribbon with the tweezers but gently scoop it up so it does not tear the sample.
Comments
The bracket for tunica
The bracket for tunica adventitia should span a larger area. It starts at the end of the tunica media (end of layers of smooth muscle) and should continue for the rest of the picture (you haven't shown the end of the adventitia.