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Encyclopedia > Stages of human development

Human development is the process of growing to maturity and reaching one's full potential. In biological terms, this entails growth from a one-celled zygote to an adult human being. The psychological study of human development is called developmental psychology. In biology growth is increase in size. ... This article or section does not cite its references or sources. ... Human beings are defined variously in biological, spiritual, and cultural terms, or in combinations thereof. ... Psychology (Gk: psyche, soul or mind + logos, speech) is an academic and applied field involving the study of the mind, brain, and behavior, both human and nonhuman. ... Hans Baldung Grien: The Ages And Death, c. ...


We can conceive of human development in a variety of ways. In political-economic terms, human development has to do with stability, security and relative prosperity. In social terms, it has to do with literacy, education, social relationships, quality of life, etc. In moral terms, it has to do with the development of the conscience, moral awareness, and the will and capacity to act according to our knowledge of what is right. In psychological terms, human development has to do with mental health, self-esteem, success in significant relationships, happiness

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Biological development

A spermatozoon fertilizing an ovum
A spermatozoon fertilizing an ovum

Development begins with fertilization, the process by which the male gamete, the sperm cell, and the female gamete, the oocyte, fuse to give rise to a diploid cell, the zygote. Image File history File links A sperm attempts to penetrate the ovum coat to fertilize it. ... Image File history File links A sperm attempts to penetrate the ovum coat to fertilize it. ... Categories: Biology stubs ... Gametes, from the ancient Greek γαμετης (spouse), are the specialized germ cells that come together during fertilization (conception) in organisms that reproduce sexually. ... A spermatozoon or spermatozoan ( spermatozoa), from the ancient Greek σπερμα (seed) and ζων (alive) and more commonly known as a sperm cell, is the haploid cell that is the male gamete. ... An oocyte or ovocyte is a female gametocyte that divides twice by mitosis and meiosis into two other oocytes or into two ootids. ... Diploid (meaning double in Greek) cells have two copies (homologs) of each chromosome (both sex- and non-sex determining chromosomes), usually one from the mother and one from the father. ... It has been suggested that extracellular be merged into this article or section. ...


In medicine, pregnancy is defined as beginning when a fertilized zygote becomes implanted in a woman's uterus. This occurs when the zygote then becomes embedded into the endometrium (lining of the uterus) where it forms a placenta, for the purpose of receiving essential nutrients through the uterus wall. The umbilical cord in a newborn child signifies the remnants of implantation. This article or section does not cite its references or sources. ... Implantation occurs when a fertilized zygote attaches itself onto the lining of the uterus. ... The uterus or womb is the major female reproductive organ of most mammals, including humans. ... The endometrium is the inner uterine membrane in mammals which is developed in preparation for the implantation of a fertilized egg upon its arrival into the uterus. ... The placenta is an ephemeral (temporary) organ present only in female placental mammals during gestation (pregnancy). ... Nutrients and the body A nutrient is any element or compound necessary for or contributing to an organisms metabolism, growth, or other functioning. ... The uterus or womb is the major female reproductive organ of most mammals, including humans. ... A newborn at 45 seconds. ...


The zygote undergoes rapid mitotic divisions with no significant growth (a process known as cleavage) and cellular differentiation, leading to development of an embryo. Light micrograph of a newt kidney cell in early anaphase of mitosis. ... This article or section does not cite its references or sources. ... In embryology, cleavage is the division of cells in the early embryo. ... Embryonic stem cells differentiate into cells in various body organs. ... Embryos (and one tadpole) of the wrinkled frog (Rana rugosa). ...


Childbirth is the process in which the baby is born. It is considered by many to be the beginning of a person's life, where age is defined relative to this event in most cultures. Childbirth (also called labo(u)r, birth, partus or parturition) is the culmination of a human pregnancy with the emergence of a newborn infant from its mothers uterus. ...


Physical stages

Terms for stages of age-related physical development include, with their approximate age ranges:

Also sometimes used are terms that specify one's age in decades, such as: This article or section does not cite its references or sources. ... The term conception can refer to more than one meaning: Concept Fertilisation This is a disambiguation page — a navigational aid which lists pages that might otherwise share the same title. ... Embryos (and one tadpole) of the wrinkled frog (Rana rugosa). ... Fetus at eight weeks Foetus redirects here. ... Childbirth (also called labo(u)r, birth, partus or parturition) is the culmination of a human pregnancy with the emergence of a newborn infant from its mothers uterus. ... An infant Infant is a slightly more formal word for baby, the youngest category of child. ... A male toddler A female toddler A toddler is a child between the ages of one and three years old, although some may consider a toddler to be between two and five. ... Primary or elementary education is the first years of formal, structured education that occurs during childhood. ... Primary or elementary education is the first years of formal, structured education that occurs during childhood. ... A separate article is about the punk band called The Adolescents. ... American high school students participate in a NASA project to design lunar habitats Adolescence is the period of psychological and social transition between childhood and adulthood (gender-specific manhood, or womanhood). ... The general term Young adult refers to different age groups based on context: In popular usage, young adult is a euphemism for an adolescent. ... The term adult describes any mature organism, but normally it refers to a human: one that is no longer a child / minor and is now either a man or a woman. ... The term adult describes any mature organism, but normally it refers to a human: one that is no longer a child / minor and is now either a man or a woman. ... Middle age is a non-specific age when a person is not old, not young, but somewhere in the middle. ... Old age consists of ages nearing the average lifespan of human beings, and thus the end of the human life cycle. ... Old age consists of ages nearing the average lifespan of human beings, and thus the end of the human life cycle. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...

A twenty-something is a person in the age group 20 to 29. ... A thirty-something is a person in the age group 30 to 39 years old. ... A centenarian is a person who has attained the age of 100 years or more. ... A supercentenarian (sometimes hyphenated as super-centenarian) is someone who has reached the age of 110 years or more, something achieved by only one in a thousand centenarians (0. ...

Physical development milestones

Note: the Tanner stages can be used to approximately judge a child's age based on physical development. This page is a candidate to be copied to Wiktionary. ... Woman walking downstairs Walk redirects here. ... One might be looking for the academic discipline of communications. ... Human voice consists of sound made by a person using the vocal folds for talking, singing, laughing, screaming or crying. ... Pubic hair is hair in the frontal genital area, the crotch, and sometimes at the top of the inside of the legs; these areas form the pubic region. ... A sex organ, or primary sexual characteristic, narrowly defined, is any of those parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in an complex organism; namely: Male: penis (notably the glans penis... The menstrual cycle is the periodic change in a womans body that occurs every month between puberty and menopause and that relates to reproduction. ... Hair is also a musical: see Hair (musical) and Hair (movie) Hair is the filamentous outgrowth of the epidermis found in mammals. ... A typical full beard and mustache. ... The Tanner stages (also known as the Tanner scale) are stages of physical development in children, adolescents and adults. ...


Cognitive development

See:

See also: Child art is the drawings, paintings and other artistic works created by children, generally under the age of 12. ... Hans Baldung Grien: The Ages And Death, c. ... Infant education is the education of children before they would normally enter school. ... This article or section contains information that has not been verified and thus might not be reliable. ... A supervised child learning the countries of Asia on the floor of the central hall of the Field Museum, Chicago, Illinois Learning is the process of acquiring knowledge, skills, attitudes, or values, through study, experience, or teaching, that causes a change of behavior that is persistent, measurable, and specified or... While many individuals are content to play a musical instrument by ear or by practicing individual pieces until a reasonable proficiency is achieved, others wish to develop mastery of one or more instruments, and commonly seek formal instruction in the form of music lessons. ...


 
 

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