[Verse 1] Left ventricle winds up like a fist made of muscle, Slams the fourth door open, that's the aortic hustle, Blood floods into the aorta, a hose wide as your thumb, Garden-hose highway, and the journey has begun. [Chorus] Out the valve, up the arch, down the spine, to the toe, Coronaries drink first — the heart won't starve, you know, Brain takes its twenty percent, kidneys grab a quarter more, Follow the map in the blood, that's the full delivery tour. [Verse 2] But wait, right above the door, two branches split away, Coronary arteries feeding the pump before it feeds the day, Selfish? No — it's logic, the engine needs its gas, The heart looks after itself first, then it lets the rest pass. [Verse 3] Now the aorta arches, curved like candy twisted sweet, Carotids climb to the tower, subclavians to the arms and feet, The brain's a VIP client, small but never light, Two percent of your body, eating a fifth of the flight. [Chorus] Out the valve, up the arch, down the spine, to the toe, Coronaries drink first — the heart won't starve, you know, Brain takes its twenty percent, kidneys grab a quarter more, Follow the map in the blood, that's the full delivery tour. [Verse 4] Down the ribs and through the diaphragm, deeper we descend, Celiac trunk waters liver, stomach, spleen — old friends, Mesenteric feeds the intestines, coiling in the dark, Renal floods the kidneys, filtering a quarter of the mark, Then pelvis, then the split — two iliacs, left and right, Racing down to ankles, all the way to toenail light. [Bridge] Arteries turn to arterioles, thinner, softer, slow, Capillaries — the loading docks — where oxygen lets go, Cells reach out and grab it, trade it for their trash and haze, Every cell's a whisper's width from where the traffic stays. [Verse 5] Now the trip reverses — venules gather up the flow, Merging into rivers, veins are heading home, and slow, But the gut's blood takes a detour, sneaking through the liver door, The portal vein's inspection stop — quality control before the floor. [Chorus] Out the valve, up the arch, down the spine, to the toe, Coronaries drink first — the heart won't starve, you know, Brain takes its twenty percent, kidneys grab a quarter more, Follow the map in the blood, that's the full delivery tour. [Outro] Aorta, arch, and artery, arteriole, capillary bed, Venule, vein, and portal gate — the whole loop, freshly fed, Out the door and back again, the body's grand encore — That's the full delivery route, in order, evermore.
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