4.2 Puberty

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

Do Now 'Puberty'

Answer the following questions.

1. What are hormones?

2. What are secondary sexual characteristics?

Puberty

Physical Changes

hormones

• hormones = substances that control the functioning of organs
• hormones travel in the bloodstream
• hormones are produced by the endocrine glands

pituitary gland 

• NL: hypofyse
• Produces hormones that stimulate:

     - growth spurt

     - production sperm cells /       

       maturation egg cells 

     - ovaries / testes to produce 

       sex hormones

Sex hormones

Hormones that work in the reproductive system are called sex hormones. 

• Testosterone: male sex hormone
• Oestrogens: female sex hormones

Sex hormones

• Different amounts are produced in males and females
• Production of these leads to the physical change of male and female bodies
• This production happens in many stages of life!

Primary sexual characteristics:

These are present at birth.

There is a clear difference between male and female.

Secondary sexual characteristics:

These develop during puberty under the influence of hormones.

These secondary sexual characteristics make the differences between males and females even clearer.

More interest in other people.

Sometimes you fall in love with someone.

Sexuality starts to play an important role in life.

You start to act more independently of your parents.

You start behaving differently towards friends, and friendships are more often in groups.

Sometimes you feel angry, uncertain, lonely or sad.

Everyone has a different development process and every body is different.

Does puberty always start at the same age?

1. Yes
2. No

Does puberty last just as long for everyone?

1. Yes
2. No

to do:

1. Read pages 18 + 19 

2. Do assignments 1-7 (page 20-23)

homework for friday

1. read bs2 thoroughly.

2. finish assignments 1-7