blood vessel dilation

• vasodilationRelaxation of vessel walls
• arteriesTubes carrying oxygenated blood
• veinsBlood-return tubes
• capillariesTiniest blood vessels
• flushingWashing by water surge

warmth · redness · blood flow · circulation · nitric oxide · relaxation · widening · heat · pulse · throbbing · swelling · inflammation · alcohol · blushing · fever · hot flash · smooth muscle · hypotension

• cholinergic systemacetylcholine, cholinergic, choline, cholinesterase, parasympathetic