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.
Other excretory products are pigments, mostly formed. by the breakdown of haemoglobin; drugs etc. Protein metabolism produces nitrogenous waste. material such as ammonia, which is the basic. nitrogenous catabolite of protein, formed by. breakdown of amino acids. Removal of the amino.