NCERT Class 8th Chapter - 10 Adolescence

Updated Thu, 02 Jun 2022 12:58 AM IST


If you are searching for notes on your chapter adolescence in your book, then this article for you . You find everything about it . so read the complete article carefully.

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 Adolescence Age 

 Child born at the time called infant thereafter he reaches the child stage called life then, adolescence.  The period of life when the body has its own organs are developing rapidly.  That state is called adolescence.  This period starts from the age of about 11 years old and lived until the age of 18 or 19 years.  Than boys this age girls are already starting 1 or 2 years.  So are girls  early maturing than boys.

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Topic including in this article
What is adolescence
Signs of adolescence
Menstruation in girls
Sex determination
Important secretion of hormones
Nutrition in adolescence

Signs of Adolescence:

  • Changes in puberty ,  Be increased in length begins.
  • The body is starting to change shape.
  • the change in tone.  Boys are inside come out emerged Adams Apple and girls are sound and strong.
  • the development of reproductive organs.  Girls are the ovaries increase in size.  Boys are looking to shave mustaches come.
  • puberty is the testes - start of testosterone or male hormones.  Ovaries in girls starts to be estrogen or female hormones.Start of reproductive age women are aged 10 to 12 years old and it moves generally 45 to 50 years of age             


    Eggs begin to mature at puberty.  An egg matures in the ovary and is released by one of the ovaries at an interval of about 28 to 30 days. If it does not fertilize it is divided and exits the body.It is bleeding in women.Known as menstruation or menses.


Sex determination 

  1.  Sex determination is a key role of chromosomes.  Men have the XX chromosome possessed while parents are XY chromosome.  When you meet someone chromosome male chromosomes that is when sperm fertilization occurs then meet egg.  During the infusion if you get the chromosomes of the male X chromosome parents will girl.  But if I have the Y chromosome get the x chromosome parents will then child boy.  Looking at the photos below you can unders

Important secretion of hormones

Our bodies are moving all actions.Lots glands of them are individually generate different hormones.Which perform different functions in our body.Let us know about some important hormones.



1.Pituitary gland

 pituitary glands control the growth of our body.Growth hormone released by the pituitary gland hormones say.This gland is found in our brain.Length to right the gland work right either is much increased or not increased.

2.Thyroid glands: -

This gland is found in our throats.It works to balance our voices.Says thyroxine hormone released from the gland. This gland is working becomes a disease called Gaytr if not.Which is our throats flowers.

3. Adrenal gland :-

This gland is found in the part of our stomachs.This gland makes hormones called Adrinelin.That our bodies anger, balance the anxiety and excitement.

4. pancreas :-

This hormone is also found in parts of our stomach.It generated a hormone called insulin.Which helps to digest the food in our body.It is caused by a disease called diabetes.


Source: Amar ujala

ovaries: -

it is feminine organs. The hormone is produced called It estrogen.

6. testis

it into male organ.It is generated hormone testosterone.

Nutritional needs of teens

Our body is made up of lots of cells.Each cell has an individual basis.During adolescence, the body’s rapid growth.Body This increase is in need of a good diet.What we call a balanced diet.Balanced diet of protein, carbohydrates, incorporation required a substantial amount of fat, vitamins and minerals.Milk is a balanced diet for yourself.In the meantime we would also need physical exercise along with a good diet.So all parts of the body continue to function correctly.

Q1- what is the three stage of adolescence?

Answer- Adolescence, these years from puberty to adulthood, may be roughly divided into three stages: earlyadolescence, generally ages eleven to fourteen; middleadolescence, ages fifteen to seventeen; and lateadolescence, ages eighteen to twenty-one.

Q2-what are the five characteristic of adolescence?

Answer- The five leading characteristics of adolescence are biological growth and development, an undefined status, increased decision making, increased pressures, and the search for self.

Q3-what is the behaviour of adolescence?

Answer- Behaviorally, adolescence is associated with volatile emotions and boundary-testing behavior as individuals explore and assert personal identity, learn to navigate peer relationships, and transition to independence.

Q4-what are the emotional changes in adolescence?

Answer-During puberty your child's emotions may become stronger and more intense. Their mood might change more frequently, quickly and randomly. Your child may have strong emotions that they've never experienced before. It's common for them to feel confused, scared or angry and not know why.

Q5-what are the first sign puberty in girl?

Answer- The earliest sign of puberty in most girls is the development of breast "buds," nickel-sized bumps under the nipple. It is not unusual for breast growth to start on one side before the other. It's also common for breast buds to be somewhat tender or sore.

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