Total Magnification: 100X ; Objective Magnification: 10X
TM: Tunica Media
TA: Tunica Adventitia
B: Blood
L: Lumen
CF: Collegen Fibers
CT: Connective Tissue (around nerves - not shown)
Histo-Tips: When differentiating between artierioles and capillaries remember that artierioles have 1-3 smooth muscle layers while capillaries have none, and if you see a single red blood cell filling the whole lumen it is definitely a capillary.
Comments
The section you have labeled
The section you have labeled as TI is the TM. Then the TM/TA area is just TA. In veins, you see none or just a few layers of smooth muscle, and then a larger amount of tunica adventitia. You often can't see the tunica intima - that's ok if it's not visible in your image.