STAGES OF

Apuntes

•Stages of the Human Life Cycle •Childhood Childhood extends from birth to the start of adolescence. During this period, humans undergo rapid physical, emotional, and cognitive development. They grow quickly, learn to control their bodies, and develop speaking, reading, and writing skills. From birth, boys and girls are distinguished by primary sex characteristics, including male and female reproductive systems. •Adolescence Adolescence is the transitional phase between childhood and adulthood. During this stage, individuals experience significant physical and mental changes and reach sexual maturity, enabling reproduction. Physical changes include voice deepening around age 14, testes growth at 11, pubic hair development, first ejaculation at 12-13, facial hair at 14, and first menstruation at 12-13. The pituitary gland, ovaries, and testes begin producing sex hormones. Mentally, adolescents often experience mood swings, feel the need to isolate from family, value friendships highly, and develop strong emotions related to sex and love. They also form political and social ideas. •Human Reproductive System The male and female reproductive systems share functions such as pro...