Total Magnification: 100x
Key:
IEM: Internal Elastic Membrane
TA: Tunica Adventitia
SM: Smooth Muscle
EF: Elastic Fibers
Histo-Tips: When dealing with multiple layers of tissue, for example muscle tissue, it is helpful to start from the inside and work outward: Myofibril -> muscle fiber -> endomysium -> fiber bundles -> perimysium ->epimysium.
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.