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Apparent death [a] is a behavior in which animals take on the appearance of being dead. It is an immobile state most often triggered by a predatory attack and can be found in a wide range of animals from insects and crustaceans to mammals, birds, reptiles, amphibians, and fish. [1] [5] [2] Apparent death is separate from the freezing behavior ...
Apoptosis (from Ancient Greek: ἀπόπτωσις, romanized : apóptōsis, lit. 'falling off') is a form of programmed cell death that occurs in multicellular organisms and in some eukaryotic, single-celled microorganisms such as yeast. [ 1] Biochemical events lead to characteristic cell changes ( morphology) and death. [ 2]
Fight-or-flight response. A dog and a cat expressing the fight (top) and flight (bottom) response simultaneously. The fight-or-flight or the fight-flight-freeze-or-fawn[ 1] (also called hyperarousal or the acute stress response) is a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival. [ 2]
Programmed cell death ( PCD; sometimes referred to as cellular suicide [1]) is the death of a cell as a result of events inside of a cell, such as apoptosis or autophagy. [2] [3] PCD is carried out in a biological process, which usually confers advantage during an organism's lifecycle. For example, the differentiation of fingers and toes in a ...
The stages that follow shortly after death are: Corneal opacity or "clouding". Pallor mortis, paleness which happens in the first 15–120 minutes after death. Livor mortis, or dependent lividity, a settling of the blood in the lower (dependent) portion of the body. Algor mortis, the reduction in body temperature following death.
Creutzfeldt–Jakob disease ( CJD ), also known as subacute spongiform encephalopathy or neurocognitive disorder due to prion disease, is a fatal neurodegenerative disease. [4] [1] Early symptoms include memory problems, behavioral changes, poor coordination, and visual disturbances. [4] Later symptoms include dementia, involuntary movements ...
Manner of death. In many legal jurisdictions, the manner of death is a determination, typically made by the coroner, medical examiner, police, or similar officials, and recorded as a vital statistic. Within the United States and the United Kingdom, a distinction is made between the cause of death, which is a specific disease or injury, versus ...
Frequency. 1 in 1,000–10,000. Sudden infant death syndrome ( SIDS ), sometimes known as cot death, is the sudden unexplained death of a child of less than one year of age. Diagnosis requires that the death remain unexplained even after a thorough autopsy and detailed death scene investigation. [ 2] SIDS usually occurs during sleep. [ 3]