#organic_phenomenon__organicphenomenon a natural phenomenon involving living plants and animals
supertype: #natural_phenomenon__naturalphenomenon all non-artificial phenomena
subtype: #abiogenesis__abiogenesi__autogenesis__autogenesi__autogeny__spontaneous_generation__spontaneousgeneration a hypothetical organic phenomenon by which living organisms are created from nonliving matter
subtype: #alternation_of_generations__heterogenesis__heterogenesi__xenogenesis the alternation of two or more different forms in the life cycle of a plant or animal
subtype: #metagenesis__digenesis__digenesi alternation of sexual and asexual generations
subtype: #annual_ring__growth_ring an annual formation of wood in plants as they grow
subtype: #bioelectricity electric phenomena in animals or plants
subtype: #brainwave__brain_wave__brainwave__cortical_potential (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
subtype: #alpha_rhythm__alpharhythm__alpha_wave__alphawave the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz
subtype: #beta_rhythm__beta_wave the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz
subtype: #delta_rhythm__deltarhythm__delta_wave__deltawave the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
subtype: #theta_rhythm__thetarhythm__theta_wave__thetawave the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude
subtype: #circulation the movement of blood through the heart and blood vessels
subtype: #systemic_circulation circulation that supplies blood to all the body except to the lungs
subtype: #pulmonary_circulation__pulmonarycirculation circulation of blood between the heart and the lungs
subtype: #vitelline_circulation__vitellinecirculation circulation of blood between the embryo and the yolk sac
subtype: #cyclosis__streaming the circulation of cytoplasm within a cell
subtype: #death the permanent end of all life functions in an organism or part of an organism; "the animal died a painful death"
subtype: #necrobiosis__necrobiosi__cell_death (physiology) the normal degeneration and death of living cells (as in various epithelial cells)
subtype: #apoptosis__apoptosi__programmed_cell_death__caspase-mediated_cell_death a type of cell death in which the cell uses specialized cellular machinery to kill itself; a cell suicide mechanism that enables metazoans to control cell number and eliminate cells that threaten the animal's survival
subtype: #necrosis__mortification__gangrene__sphacelus the localized death of living cells (as from infection or the interruption of blood supply)
subtype: #myonecrosis localized death of muscle cell fibers
subtype: #brain_death__cerebral_death death when respiration and other reflexes are absent; consciousness is gone; organs can be removed for transplantation before the heartbeat stops
subtype: #decay.organic_phenomenon__decomposition the organic phenomenon of rotting
subtype: #dehiscence (biology) release of material by splitting open of an organ or tissue; (botany) natural bursting open at maturity of a fruit or other reproductive body to release seeds or spores; (surgery) bursting open of a surgically closed wound
subtype: #desquamation__peeling__shedding loss of bits of outer skin by peeling or shedding or coming off in scales
subtype: #exfoliation the peeling off in flakes or scales of bark or dead skin; "exfoliation is increased by sunburn"
subtype: #diapedesis passage of blood cells (especially white blood cells) through intact capillary walls and into the surrounding tissue
subtype: #facilitation.organic_phenomenon (neurophysiology) phenomenon that occurs when two or more neural impulses that alone are not enough to trigger a response in a neuron combine to trigger an action potential
subtype: #food_chain (ecology) a community of organisms where each member is eaten in turn by another member
subtype: #food_pyramid (ecology) a hierarchy of food chains with the principle predator at the top; each level preys on the level below
subtype: #food_web__food_cycle (ecology) a community of organisms where there are several interrelated food chains
subtype: #histocompatibility condition in which the cells of one tissue can survive in the presence of cells of another tissue; "a successful graft or translplant requires a high degree of histocompatibility"
subtype: #life.organic_phenomenon the organic phenomenon that distinguishes living organisms from nonliving ones; "there is no life on the moon"
subtype: #biology characteristic life processes and phenomena of living organisms: "the biology of viruses"
subtype: #aerobiosis life sustained in the presence of air or oxygen
subtype: #life_cycle a series of stages through which an organism passes between recurrences of a primary stage
subtype: #pleomorphism (biology) the appearance of two or more distinctly different forms in the life cycle of some organisms
subtype: #polymorphism (biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences)
subtype: #dimorphism (biology) the existence of two forms of individual within the same animal species (independent of sex differences)
subtype: #rejection.organic_phenomenon (medicine) immunological response that refuses to accept substances or organisms that are recognized as foreign; "rejection of the transplanted liver"
subtype: #greening__rejuvenation the phenomenon of vitality and freshness being restored; "the annual rejuvenation of the landscape"
subtype: #sex-linkage an association between genes in sex chromosomes that makes some characteristics appear more frequently in one sex than in the other
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