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In biology, a biological life cycle (or just life cycle when the biological context is clear) is a series of stages of the life of an organism, that begins as a zygote, often in an egg, and concludes as an adult that reproduces, producing an offspring in the form of a new zygote which then itself goes through the same series of stages, the ...
Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 36 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus .
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
Approximate outline of development periods in postnatal human development until what generally is regarded as adulthood. There are no universally unanimous definitions, so they vary considerably, but generally fall within the faded intervals at the flanks of the periods.
Personal life, the course of an individual's life; Everyday life, the ways in which people typically act, think, and feel on a daily basis; Human condition, the characteristics and key events that compose the essentials of human existence; Human rights, principles or norms that describe certain standards of human behaviour and are regularly ...
Human biology is an interdisciplinary area of academic study that examines humans through the influences and interplay of many diverse fields such as genetics, evolution, physiology, anatomy, epidemiology, anthropology, ecology, nutrition, population genetics, and sociocultural influences.
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