muscle of arm ribonucleic acid level triceps brachii ribonucleic acid level 2025-02-11T17:05:13Z CMO:0004051 This is any measurement of the absolute or relative amount(s) of one or more of the ribonucleic acids (RNAs) found in the triceps brachii, the three headed muscle responsible for extension of the elbow joint. clinical_measurement_ontology slaulederkind triceps RNA level triceps brachii RNA level triceps brachii muscle RNA level triceps brachii muscle ribonucleic acid level