Menstrual cycle

Reproduction
bs 4: The menstrual cycle
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Slide 1: Tekstslide
BiologieMiddelbare schoolvwoLeerjaar 1

In deze les zitten 24 slides, met interactieve quizzen, tekstslides en 1 video.

time-iconLesduur is: 45 min

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Reproduction
bs 4: The menstrual cycle

Slide 1 - Tekstslide

Learning goals bs. 4
  1. You can explain what is happening during the 4 phases of the menstrual cycle

Slide 2 - Tekstslide

What is menstruation?
  • Release of blood from the uterus through the vagina
  • Start around age 12

Slide 3 - Tekstslide

How does it happen? 
  • Hormones estrogen en progesterone build up uterus lining

  • Fertilized egg could attach to this

  • No fertilized egg? --> Lining is shed

  • cylce: it happens over and over again (450 times in a life time)

Slide 4 - Tekstslide

Slide 5 - Video

Menstrual cycle
  • The menstrual cycle is the process that the female sex organs go through each month again; preparing an egg for fertilisation, and getting rid of it when it is not fertilised.

  • This whole process is regulated by hormones

  • This cycle generally lasts somewhere between 21 to 35 days, on average it is 28 days (that is why we normally count in months)
28 days = 4 weeks

Slide 6 - Tekstslide

Menstrual cycle

Slide 7 - Tekstslide

4 Phases
  • Phase 1 (day 1-5) : menstruation
  • Uterus lining is shed through the vagina (no fertilized egg)

  • Phase 2 (day 6-12): repair phase
  • uterus lining build new layer of mucus
  • new egg cell develops in the ovary

Slide 8 - Tekstslide

4 Phases
  • Phase 3: Ovulation (day 13-15)
  • A new ova is released and send down the oviduct

  • Phase 4: Receptive phase (day 16 - 28)
  • Uterus lining grows to form a 'nest' for the egg cell
  • No fertilized egg cell? --> cycle starts again!

Slide 9 - Tekstslide

Menstruation
When an egg is not fertilised, part of the uterus lining detaches. This is menstruation.

Average age for girls to start their menstruation is 13.

The first day of menstruation is day 1 of the menstrual cycle

Slide 10 - Tekstslide

Slide 11 - Tekstslide

Slide 12 - Tekstslide

Slide 13 - Tekstslide

Slide 14 - Tekstslide

What determines the beginning of the menstruation cycle?
A
Release of blood through the vagina
B
The release of the egg cell from the ovaries
C
The growing of the uterus lining
D
The cycle can start anytime

Slide 15 - Quizvraag

In which part of the female reproductive system do the ova (egg cells) develop?
A
Fallopian tube/Oviduct
B
Ovaries
C
Uterus
D
Vagina

Slide 16 - Quizvraag

In which part of the female reproductive system does the fertilised egg cell grow into a baby?
A
Fallopian tube/Oviduct
B
Ovaries
C
Uterus
D
Vagina

Slide 17 - Quizvraag

On which day in the cycle does ovulation occur?
A
Day 1
B
Day 14
C
Day 20
D
Day 28

Slide 18 - Quizvraag

What is shed during the menstruation of a female?
A
The ovaries
B
The egg cell
C
The uterus lining
D
Nothing

Slide 19 - Quizvraag

How long does an released egg cell survive?
A
15 days
B
4 days
C
about an hour
D
1-2 days

Slide 20 - Quizvraag

The cycle is for everyone the same. It is always 28 days.
A
True
B
False

Slide 21 - Quizvraag

How do we call the release of an egg cell into the oviduct?
A
Fertilization
B
Ovulation
C
Pregnancy
D
Contraceptive

Slide 22 - Quizvraag

Anne her period starts at the 10th of May. When is it most likely her ovulation occurs?
A
May 14th
B
June 14th
C
May 24th
D
June 24th

Slide 23 - Quizvraag

Explain why they talk about 38 weeks pregnancy instead of 36 (9 months) counting from your last menstruation

Slide 24 - Open vraag