Artificial organ a stationary power supply or other stationary resources such as filters or chemical processing units. (Periodic rapid recharging of batteries, refilling of chemicals, and/or cleaning/replacing of filters would exclude a device from being called an artificial organ.) Thus, a dialysis machine, while a very successful and critically important life support device that almost completely replaces the duties of a kidney, is not an artificial organ. Constructing and installing artificial organs, an extremely research-intensive and expensive process initially, may entail many years of ongoing maintenance services not needed by a natural organ.: The use of any artificial organ by humans is
Transneuronal degeneration under electron microscopes and see that these cells rapidly degenerate. The first signs of degeneration seen after the removal of the bulb was mitochondrial swelling and then an increase in electron density in the cytoplasm. Nuclear changes are seen later in which chromatin condenses and the nucleolus becomes replaced with large clusters of electron dense material. Once the degeneration has advanced far enough, ribosomes begin to disperse throughout the cell. Some cells are then phagocytosed by astrocytes and microglia. This study showed that the most cells affected by the necrosis were not directly connected to the olfactory bulb, but were