Giraffe have unusually high heart rates for their size, at 150 beats per minute. When the animal lowers its head the blood rushes down fairly unopposed and a rete mirabile in the upper neck, with its large cross sectional area, prevents excess blood flow to the brain. When it raises again, the blood vessels constrict and direct blood into the brain so the animal does not faint. The jugular veins contain several (most commonly seven) valves to prevent blood flowing back into the head from the inferior vena cava and right atrium while the head is lowered. Conversely, the blood vessels
Heart-Shaped Glasses (When the Heart Guides the Hand) of a large crowd, Manson begins singing as Wood watches him intently, apparently masturbating, from the crowd (still wearing the heart-shaped glasses), while numerous photos begin to fall over the audience. Shots of the two driving are flashed throughout the video, as the scene once again changes, this time revealing Manson and Wood in a bed, drenched in what appears to be blood. The two begin kissing vigorously again before the final scene returns to the two of them speeding along the highway. The front of the car erupts in flames, and they continue along, kissing once again. Manson says