: 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.
Quick Answer. Blood serum is yellow. The red color of human blood comes from hemochrome, a pigment that transports oxygen throughout the bloodstream. Blood's liquid nature, however, comes from the serum. According to About.com's Regina Bailey, plasma makes up 55 percent of human blood by volume.