Life Transitions: Necrosis
LIFE TRANSITIONS: NECROSIS
1.0 Introduction
Death of cells in the animal body may either occur normally or pathologically (caused by disease). There are three distinct modes of cell death, Necrobiosis, Apoptosis, and Necrosis. The first two are considered as a homeostatic (the ability or tendency of an organism or cell to maintain internal equilibrium by adjusting its physiological processes) mechanism of the body in controlling cell population, renewal of cells, and in the process of “improving” organs. Necrosis is the term used for the un-programmed death of tissue. Apoptosis and Necrobiosis are programmed cell-deaths. Necrosis is not reversible. The causes of Necrosis may be internal or external, and there are various types of Necrosis, some of which are:
• Coagulative Necrosis
• Avascular Necrosis
• Ischemic Necrosis
• Osteonecrosis
• Aseptic Necrosis
• Liquefactive Necrosis
• Caseous Necrosis
• Fat Necrosis
• Fibrinoid Necrosis
•......
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