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Human growthand development. Development of the human body is the process of growth to maturity. The process begins with fertilization, where an egg released from the ovary of a female is penetrated by a sperm cell from a male. The resulting zygote develops through mitosis and cell differentiation, and the resulting embryo then implants in the ...
The human life span has been split into various stages ranging from three to twelve. Common stages include infancy , childhood , adolescence , adulthood and old age . [201] The lengths of these stages have varied across cultures and time periods but is typified by an unusually rapid growth spurt during adolescence. [202]
Human embryonic development or human embryogenesis is the development and formation of the human embryo. It is characterised by the processes of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, the development of the human body entails growth from a one-celled ...
Biological life cycle. 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 ...
A single-cell embryonic human zygote is the beginning of the diploid phase of the human life cycle, when two genetically unique haploid cells created via meiosis and chromosomal translocation combine their DNA and begin to develop into a multicellular organism. Some members of the medical community accept fertilization as the point at which ...
Pages in category "Human life stages". The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes .
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 . It includes brief explanations of the various taxonomic ranks in ...
The haplodiplontic life cycle can be considered a fusion of the diplontic and haplontic life cycles. [citation needed] In plants and animals Overview of chromatides' and chromosomes' distribution within the mitotic and meiotic cycle of a male human cell. Meiosis occurs in all animals and plants.
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