SMC - Smooth muscle cells
TA - Tunica adventitia
L - Lumen
Total magnification - 100x
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
Good - you also could have
Good - you also could have labeled the endothelial layer (simple squamous) and the smooth muscle layers make up the tunica media. But you labels are correct - you don't have to make changes.