5.6 Pregnancy

Welcome everyone 
 Think about...
  • Take off your coat, hat/cap off.
  • Mobile in the phone bag (on silent).
  • Book (laptop) + notebook, pen on the table. Bag on the floor.
  • Sit in your own place.
  • You can eat and drink in the canteen.
  • 5 minutes.
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5:00
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Slide 1: Tekstslide
BiologieMiddelbare schoolvwoLeerjaar 2

In deze les zitten 28 slides, met interactieve quizzen, tekstslides en 2 videos.

time-iconLesduur is: 50 min

Onderdelen in deze les

Welcome everyone 
 Think about...
  • Take off your coat, hat/cap off.
  • Mobile in the phone bag (on silent).
  • Book (laptop) + notebook, pen on the table. Bag on the floor.
  • Sit in your own place.
  • You can eat and drink in the canteen.
  • 5 minutes.
timer
5:00

Slide 1 - Tekstslide

schedule 
  • Homework done?
  • Explanation 4.6                      10 min.
  • Doing assignments              15 min      
  • Closing                                        5 min. 

Slide 2 - Tekstslide

learning goals
  • What is pregnancy and which phases are there?
  • What is implantation and why is this process needed for a healthy embryo to form?
  • What structures are there to nourish and support the developing foetus? 


Do you know when the sex of the baby will be determined?


Slide 3 - Tekstslide

Talking point 4.2

Abortion is the ending of a pregnancy by removing the embryo or fetus before it can survive outside the uterus. This procedure is legal in The Netherlands up to 24 weeks in pregnancy. In many countries in Latin America, Africa, Asia and the middle East abortion is still illegal. Discuss with another student how you feel about this.
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3:00

Slide 4 - Tekstslide

5.6 pregnancy

Slide 5 - Tekstslide

Pregnancy
  • Pregnancy is the period of development from zygote to birth. 
  • Pregnancy takes place in the female reproductive system
Zygote = fertilized egg

Slide 6 - Tekstslide

When?
7 days after fertilization there is the implantation of the embryo in the uterus lining. The next 9 months the zygote will develop into a baby.

Fertilization happens when a sperm cell meets an egg

Slide 7 - Tekstslide

In which phase of the menstrual cycle can an egg be fertilized?
A
Phase 1 (day 1-7)
B
Phase 2 (day 7-13)
C
Phase 3 (day 13-28)

Slide 8 - Quizvraag

On which day in the menstrual cycle is the implantation of the fertilized egg?
A
Between day 5-10
B
Between day 10-15
C
Between 15-20
D
Between 20-25

Slide 9 - Quizvraag

The first phase: zygote
  • A fertilized egg is also called a zygote
  • The zygote will start dividing into a tiny hollow clump of cells inside the oviduct (= cleavage).
  • The dividing zygote is called a embryo. 

Slide 10 - Tekstslide

zygote -> morula-> blastocyst -> embryo

Slide 11 - Tekstslide

Slide 12 - Video

What is cleavage?
(choose the best answer)
A
cell divisions during which the zygote grows into a tiny hollow ball of cells
B
cell divisions before fertilization
C
cell division during which the embryo grows into the first foetal stage
D
cell divisions during which the zygote grows into an foetus

Slide 13 - Quizvraag

The second phase: embryo
  • When an embryo reaches the uterus, it implants itself into the uterus lining.
  • The uterus lining develops into a placenta, which is able to provide the nutrients and oxygen through the umbilical cord to the embryo. Through the umbilical cord the embryo get rid of waste. 
So the umbilical cord is the connection between the mother and the child. Different substances can pass from mother to child through the umbilical cord, like alcohol, drugs and even some virusses.

Slide 14 - Tekstslide

Membranes
During the 3th week of pregnancy two thin membranes start to grow around the embryo: chorion and amnion

Slide 15 - Tekstslide

Membranes
Together the amnion and the chlorion form the amniotic sac. The amniotic sac is filled with amniotic fluid.

Slide 16 - Tekstslide

Membranes
In the amniotic fluid the embryo floats.

Slide 17 - Tekstslide

Explain how the embryo (and foetus) is protected.
Use the words: 'amnion', 'chorion', 'amniotic sac' and 'amniotic fluid'

Slide 18 - Open vraag

The third phase: foetus
  • After 2 months is the embryo is called a foetus. 
  • The next 7 months the foetus will develop further into a fully grown baby.
So the umbilical cord is the connection between the mother and the child. Different substances can pass from mother to child through the umbilical cord, like alcohol, drugs and even some virusses.

Slide 19 - Tekstslide

Match the different names with the different stages!
Zygote
Embryo
Foetus
Fertilized egg
Stage in which implantation happens
Month 2-9: development into a baby

Slide 20 - Sleepvraag

Slide 21 - Video

After .... weeks of pregnancy the embryo is called foetus
A
8
B
9
C
10

Slide 22 - Quizvraag

Pregnany lasts for ... weeks after fertilisation
A
38
B
39
C
40
D
41

Slide 23 - Quizvraag

The earliest moment a neonatal can be given birth to is after ... weeks of pregnancy
A
10
B
15
C
25
D
35

Slide 24 - Quizvraag

It can't be be born earlier because ...
A
The lungs are underdeveloped so it cannot breath
B
The heart can't beat by itself
C
The neonatal does not have teeth in order to eat
D
the mother cannot breast feed the neonatal

Slide 25 - Quizvraag

The placenta belongs to ..
A
the mother
B
the foetus
C
both mother and foetus

Slide 26 - Quizvraag

Homework
Do exercises 26-32
Read paragraph 7

Slide 27 - Tekstslide

Slide 28 - Tekstslide