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...en) is a protein produced and released by the liver. It is a part of the [[Renin-Angiotensin System|RAS]] that regulates blood pressure. ...words "angio" meaning vessel, "tensin" meaning tension, and "gen" meaning producing. It is thus named because it is a precursor to angiotensin, a peptide hormo

...ow]] - the fatty yellow or red tissue inside bones that is responsible for producing blood cells * [[Computed tomography scanning]] - a technique for producing cross-sectional images of the body in which X-rays are passed through the b