🔬 Chapter 6 — Adolescence: A Stage of Growth and Change
Class 7 Science | Curiosity | EduGrown Notes
@edugrown · @edugrown · @edugrown
🌱 Adolescence — A Stage of Growth and Change! Understanding your body 💪
🌱 What is Adolescence?
↑ Top
🌱Adolescence = Period of rapid growth and development between 10–19 years of age
🔄It is the transition stage between childhood and adulthood
👥Life stages of humans: Infancy → Childhood → Adolescence → Adulthood → Old Age
🌸Adolescence is also called the teenage years — when puberty begins
@edugrown · @edugrown
🌸 Physical changes during adolescence — part of growing up!
@edugrown · @edugrown
🌱 Changes in boys and girls during adolescence
💪 Physical Changes During Adolescence
↑ Top
👦 Changes in Boys
📏Increase in height — rapid growth spurt
💪Shoulders become broader; chest wider
🎙️Voice becomes deeper/hoarse (voice box grows)
🧔Facial hair — moustache, beard develop
🍎Adam's apple visible in throat
🌿Hair in armpits and pubic region
👧 Changes in Girls
📏Increase in height and weight
🌸Development of breasts
🎙️Slight change in voice (less prominent than boys)
🌿Hair in armpits and pubic region
🔄Menstruation begins
💬Common to both: Growth in height, hair in armpits/pubic area, acne/pimples on skin
⭕Acne/Pimples = caused by increased oily secretions from skin clogging pores → leads to infections
🌟Key reminder: Timing and extent of changes vary from person to person — all variations are completely NORMAL!
🔬 Puberty & Hormones
↑ Top
🌸Puberty = Stage where the body develops the ability to reproduce
🧪Hormones = Chemical messengers released by endocrine glands that control growth and development
🧬In boys: Testosterone = male sex hormone (produced by testes)
🧬In girls: Oestrogen = female sex hormone (produced by ovaries)
📅Onset of puberty in girls: 10–12 years | In boys: 11–13 years (on average)
@edugrown · @edugrown
🔬 Body changes during puberty — hormones at work!
@edugrown · @edugrown
🧬 Endocrine glands controlling adolescent development
🌟 Secondary Sexual Characteristics
↑ Top
🔬Secondary sexual characteristics = signs that body is preparing for adulthood — NOT directly involved in reproduction
👦In boys: facial hair, deeper voice, Adam's apple, broader shoulders
👧In girls: breast development, broader hips, regular menstruation
🌟 Remember — It's Normal!
Every person goes through adolescence at their OWN pace. Some may start earlier, some later — all are completely normal. Don't compare your body's development with others. Good nutrition, adequate sleep, regular exercise, and good hygiene help you navigate adolescence healthily! 💪
⭐ Quick Summary
↑ Top
📝 Key Points
🌱Adolescence = 10–19 years | Transition from childhood to adulthood | Puberty begins
👦Boys: deeper voice, facial hair, Adam's apple, broader shoulders
👧Girls: breast development, menstruation begins, broader hips
🤝Both: height increase, hair in armpits/pubic region, acne
🧪Hormones: Testosterone (boys), Oestrogen (girls) — chemical messengers of development