A-C    Cut open longitudinally
A    Artery
B    Vein
C    Capillary
D-F    Transverse sections
D    Artery
E    Vein
F    Capillary
1    Fibrous(collogan)layer(tunica externa)
2    Smooth muscle and elastic fiber layer(tunica media)
3    Endothelial layer (tunica intima)
4    Valve flaps
5    Endothelial cell
6    Lumen