2425 Sexual reproduction - BS4

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Welcome!

• Throwback basic 3 
• Instruction basic 4
• Let's talk about sex!
  

Remember this

In pairs: 

write down what happens at the four different phases of the menstrual cycle

After today you can...

- name the characteristics of sperm cells and egg cells.

- describe the fertilization of a human egg cell.

WARNING: NOT ALL LEARNING GOALS OF BASIC 4 ARE INCLUDED 

Concepts: 

Sperm cell ,egg cell, erection, sexual intercourse (vaginal), fertilization, fertile period, 

Egg cell vs sperm cell 

Fertilization

• During fertilization, the nuclei of a male sex cell and a female sex cell fuse together. This happens in the fallopian tube.

When one egg cell is fertilized with two sperm cells, the woman will have twins

1. True
2. False

When two egg cells ripen and are fertilised, the woman will have identical twins

1. True
2. False

When one egg cell ripens and becomes fertilised, there still is a chance on identical twins

1. True
2. False

Assume a 28-day cycle. On which days can the woman become pregnant, when the egg cell is ripe 24 hours and sperm cells are alive for 5 days? Explain your answer.

Fertile window

• Egg cell is alive for 24 hours
• Sperm cells live up to 5 days 
• Fertile window is the time that a women is fertile and is around six days  

Sexual aroused 

• A feeling of being turned on
• This includes physical and mental changes
• Being curious
• For men: an erection
• For women: producing cervical fluid

Penis in flaccid state

Penis in erect state 

Vulva's 

Erection of the clitoris

At what age (on average) do adolescents in The Netherlands have their first french kiss?

1. 10 years
2. 12 years
3. 14 years
4. 16 years

At what age (on average) do boys in The Netherlands masturbate for the first time?

1. 11 years
2. 12 years
3. 13 years
4. 14 years

At what age (on average) do girls in The Netherlands masturbate for the first time?

1. 11 years
2. 12 years
3. 13 years
4. 14 years

At what age (on average) do adolescents in The Netherlands have their first penis-in-vagina sex?

1. 16 years
2. 17 years
3. 18 years
4. 19 years

What is, in your opinion, sex?

ntr.nl

sense.info