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
My Heart Bleeds the Darkest Blood My Heart Bleeds the Darkest Blood "My Heart Bleeds the Darkest Blood" is a song from the hardcore punk band Shai Hulud from their debut album "Hearts Once Nourished with Hope and Compassion". It is considered one of their most recognizable song, and in almost every show it's played. The song was written in one night. The opening guitar riff was a direct result of the sadness everyone felt due to Oliver Chapoy's mother dying. The sample played before the song starts (on Solely Concentrating on the Negative Aspects of Life) is Bill Murray saying "It's gonna be cold. It's