3A 4.3 Becoming fertile

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 3

Starter Assignment

Answer the following question in your notebook:

How do you enter puberty? 

 

Welcome

Walk quietly into the room and speak softly

Sit on your chair

Take off your coat

Take your book, notebook + pen

Hoe kom je in de puberteit?

Program

• Learning objectives
  
• Explanation of basic material 3 --> Becoming fertile
  
• Making assignments
  
• Closing --> checking learning objectives

Theme 4 reproduction

• 4.1 Genitals part 1
  
• 4.2 Puberty
  
• 4.3 Becoming fertile
  
• 4.4 Getting pregnant
  
• 4.5 Sexuality
  
• 4.6 Safe sex
  
• 4.7 More contraceptives
  
• 4.8 The birth

Learning objectives 4.3

• You can explain how sperm cells and egg cells are formed
• You can describe the menstrual cycle

Sperm cells and egg cells

Production sperm cells 

Maturation of egg cells

Egg cell

• Egg cells are already present at birth in resting state

• Ovulation (ovulation) starts during puberty

• Cells in the wall produce oestrogens

Maturing follicle

Rijpende follikel

FSH

LH

Oestrogeen

Ovulatie/eisprong

FSH

LH

Progesteron

Oestrogeen

Ovulation = eisprong

Rijpende eicel

1. Onrijpe eicellen zitten in eierstok in blaasjes = follikels
   
2. De eicel groeit/neemt voedingsstoffen op en het follikel neemt vocht op
   
3. Na (±) 14 dagen is follikel zo groot dat het knapt (= ovulatie/ eisprong), de eicel komt nu in de eileider terecht.

Ovulation

• Every 4 weeks

• 1 egg at a time

• Alternately from both ovaries

• The egg cannot move

• The egg only lives for 12-24 hours

Lots of reserve food

In the womb

In case the egg is fertilized, the uterus must prepare itself.

During the maturation of the egg, the uterine lining becomes thicker.

If the egg is not fertilized, this lining will come loose again = menstruation/period

Menstrual cycle

1. Menstruation and egg maturation
   
2. Uterine lining becomes thicker
   
3. Ovulation
   
4. Uterine lining remains thick (due to the corpus luteum)
   
5. Uterine lining is shed --> menstruation

Starts on the first day of menstruation.

A regular cycle lasts 28 days.

On day 14 is ovulation (ovulation)

bs 4 menstruatie

Oestrogeen

Progesteron

FSH

LH

Menstrual products

Menstrual products

Transition / menopause

Women between 40 and 60 years old --> less sex hormones --> menopause. No more egg cells mature --> menopause

Homework

Reading 4.3

Make assignments 1 to 4 and 6 to 9

Learning objectives

You can explain how

sperm cells and egg cells

are formed

You can describe the menstrual cycle

Klaar: puzzel laten maken

Hieronder lees je drie omschrijvingen. Om welke organen gaat het?
Schrijf a t/m c op en schrijf daarna meteen de juiste naam erbij.

a In dit orgaan zitten de onrijpe eicellen.
b Dit orgaan maakt hormonen die regelen dat eicellen rijp worden.
c In dit orgaan worden de zaadcellen opgeslagen.

Drag the concepts to the correct boxes

Ovulation

Menstruation

Menstruation

Implantation

Ovulation

Menstruation

Welke hormonen spelen een rol bij het ontwikkelen van geslachtscellen?
( eicellen en zaadcellen)