: an exaggerated reaction to the male-oriented ''shoot-'em-up games''. noun. A movie or TV program with much gunplay and violence: gambled for cigarettes, slurped Tang or watched shoot-'emups on TV (1953+)
Circulatory system. The human circulatory system (simplified). Red indicates oxygenated blood carried in arteries, blue indicates deoxygenated blood carried in veins. Capillaries, which join the arteries and veins, and the lymphatic vessels are not shown.
The different colors of varicose veins are the result of different amount of hemoglobin, from the red blood cells, in the vein. A large vein with a lot of blood will have quite a bit of hemoglobin, it will look purple to dark green while a very small vein, with only a tiny bit of hemoglobin, will look bright red. The difference is mostly the size of the vessel. There are a couple of other factors but I want to keep it simple.