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.
Their excretion. is effected through lungs (expired air), skin (sweat) or. kidneys (urine). 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.