system内分泌系统的学习教案.pptxVIP

system内分泌系统的学习教案第1页/共83页 2023/5/12 Of all the developments that take place during the second decade of life, the only truly inevitable one is physical maturation Steinberg第2页/共83页 2023/5/13Puberty is considerably affected by the context in which it occursPhysical development is influenced by a host of environmental factors, and the timing and rate of pubertal growth vary across regions of the world, SES, ethnic groups, and historical erasIn contemporary society, the average girl reaches menarche between 12th and 13th birthday第3页/共83页 2023/5/14Physical and sexual maturation profoundly affect the way in which adolescents view themselves and the way in which they are viewed and treated by othersSocial environment exerts a tremendous impact on the meaning of puberty and on its psychological and social consequencesThe influence of early or late maturation may differ in regard to the peer group or social context where adolescents live at a given time第4页/共83页 2023/5/151. Puberty: An overviewPuberty : pubertas in Latin, means “adult”, i.e. refers to the period during which an individual becomes capable of sexual reproductionMore broadly speaking, puberty encompasses all the physical changes that occur in the growing girl or boy as she/he passes from childhood into adulthood第5页/共83页 2023/5/161. Puberty: An overviewChief manifestation of puberty (Marshall, 1978)Rapid acceleration in growth: dramatic increases in both height and weightDevelopment o primary sex characteristics,including the further development of the gonads, or sex glandsDevelopment of secondary sex characteristics, involving changes in the genitals and breast, and growth of pubic, facial, and body hair, and the further development of the sex organs第6页/共83页 2023/5/171. Puberty: An overviewChief manifestation of puberty (Marshall, 1978)Changes in body composition, specifically, in the quantity and distribution of fat and muscleChanges in the circulatory and res