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.
The central vacuole is filled with waste products until either the cell or the plant dies, it does not excrete any sort of waste. Alternately you can look at it this way: Sugar is one of the factors of plant waste. The plant stores that, and uses it for energy. Second is oxygen.