The term 'Like a Certain Vein' can be solved by the word 'Renal', which is an adjective meaning 'relating to the kidneys'. The kidneys are two bean-shaped organs located in the back of the abdomen, and they are responsible for filtering waste from the blood. Renal veins are the veins that carry blood away from the kidneys, and so the phrase 'Like a Certain Vein' is referring to the renal veins.