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Revision: Human Body: Endocrine System Biology ICSE ICSE Class 8 CISCE

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Definitions [2]

Define the following term:

Hormones

Hormones are chemical messengers created by the endocrine glands and transported through the bloodstream to govern body functions such as development, metabolism, reproduction and mood by interacting with specific target cells.

Definition: Adolescence

Adolescence is the period between the beginning of sexual maturation and entry into adult life.

Key Points

Key Points: Adolescence
  • Adolescence is the stage between childhood and adulthood (ages 10–19), marked by fast physical and emotional changes.
  • It has three stages: Early (10–14), Middle (15–17), and Late (18–19), each with different body and thinking developments.
  • Puberty brings sexual and physical changes due to hormones—testosterone in boys and oestrogen in girls.
  • Physical changes include growth in height, changes in body shape, changes in voice, and increased sweat/oil production.
  • Emotional and social changes include mood swings, seeking independence, peer pressure, and identity formation.
Key Points: Stress Management
  • Stress is a natural response to challenges, but long-term stress negatively affects physical and mental health.
  • Stress relief methods such as laughter therapy, sharing feelings, hobbies, music, singing, sports, yoga, and meditation help reduce stress effectively.
  • Life skills like time management, planning, and positive thinking improve coping ability and emotional balance.
  • Nature and social interaction through activities like gardening, outdoor games, and teamwork boost mood, confidence, and social health.
  • In cases of severe stress, professional counselling, NGOs, helplines, and government support schemes provide necessary guidance and treatment.
 
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