: 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.
Answer Wiki. Here's what caused it... you noticed it. Veins of this caliber are translucent. Venous blood is deoxygenated and very dark red in color, unlike the bright red of oxygenated arterial blood. If you look at your skin you can see the larger superficial veins underneath, and they look sort of blue.