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Development of the human body is the process of growth to maturity. The process begins with fertilization, ... Completion of growth age 17 (15–19) Puberty
Cortical white matter increases from childhood (~9 years) to adolescence (~14 years), most notably in the frontal and parietal cortices. [8] Cortical grey matter development peaks at ~12 years of age in the frontal and parietal cortices, and 14–16 years in the temporal lobes (with the superior temporal cortex being last to mature), peaking at about roughly the same age in both sexes ...
Growth is steady though slower than in first two years. Adult height can be predicted from measurements of height at three years of age; males are approximately 53% of their adult height and females, 57%. Legs grow faster than arms. Circumference of head and chest is equal; head size is in better proportion to the body.
Growth then proceeds at a slow rate until a period of rapid growth occurs shortly before puberty (between about 9 and 15 years of age). [86] Growth is not uniform in rate and timing across all parts of the body. At birth, head size is already relatively near that of an adult, but the lower parts of the body are much smaller than adult size.
In medicine and the social sciences, a young adult is generally a person in the years following adolescence, sometimes with some overlap. [1] Definitions and opinions on what qualifies as a young adult vary, with works such as Erik Erikson's stages of human development significantly influencing the definition of the term; generally, the term is often used to refer to adults in approximately ...
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 .
Stage theories typically focus on "age-appropriate" developmental tasks to be achieved at each stage. Erik Erikson and Carl Jung proposed stage theories [2] [3] of human development that encompass the entire life span, and emphasized the potential for positive change very late in life. The concept of adulthood has legal and socio-cultural ...
The growth of the brain is followed by a surge in cognitive abilities. Around the age of five, children start speaking properly and master their hand-to-eye coordination. [4] It is optimal that an environment is provided that encourages physical development and allows the children to explore and try out new things.