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.
Waste products of metabolism are excreted from the body by the kidneys through the urine. The urine contains wastes that have been filtered from the blood by the kidneys, and the resulting solution is a pale, straw yellow, or amber-colored liquid that comes out of the body through the urethra.