A hyper-realistic, microscopic view inside a human blood vessel. The environment is tubular and glowing red, with soft internal lighting bouncing off the vessel walls. Bright, glowing particles of adrenaline and cortisol—colored in electric-blue and gold—rush through the bloodstream like comet trails. Red blood cells drift in the background, slightly out of focus. Some hormonal particles are shown interacting with neural-like receptors on the vessel wall. The lighting is cinematic and scientific, with a shallow depth of field to create a sense of speed and urgency.