Medical Dictionary. arrhythmia. play. noun arÂ·rhythÂ·mia \Ä-Ërith-mÄ-É\. Medical Definition of arrhythmia. : an alteration in rhythm of the heartbeat either in time or force.
Central metabolism provides mechanisms for the generation of energy from carbon-energy source catabolism and the production of biosynthetic precursors and intermediates for the anabolic pathways essential to maintain cell structure and function.
And undigested food materials are formed into feces in the intestines and excreted from the body as solid waste in bowel movements. Urine, which is produced by the kidneys, contains the by-products of our body's metabolism â salts, toxins, and water â that end up in our blood. The kidneys and urinary tract (which includes the ureters, bladder, and urethra) filter and eliminate these waste substances from our blood.