This lesson contains 24 slides, with interactive quizzes, text slides and 1 video.
Lesson duration is: 45 min
Items in this lesson
Reproduction
bs 4: The menstrual cycle
Slide 1 - Slide
Learning goals bs. 4
You can explain what is happening during the 4 phases of the menstrual cycle
Slide 2 - Slide
What is menstruation?
Release of blood from the uterus through the vagina
Start around age 12
Slide 3 - Slide
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 - Slide
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 - Slide
Menstrual cycle
Slide 7 - Slide
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 - Slide
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 - Slide
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 - Slide
Slide 11 - Slide
Slide 12 - Slide
Slide 13 - Slide
Slide 14 - Slide
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 - Quiz
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 - Quiz
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 - Quiz
On which day in the cycle does ovulation occur?
A
Day 1
B
Day 14
C
Day 20
D
Day 28
Slide 18 - Quiz
What is shed during the menstruation of a female?
A
The ovaries
B
The egg cell
C
The uterus lining
D
Nothing
Slide 19 - Quiz
How long does an released egg cell survive?
A
15 days
B
4 days
C
about an hour
D
1-2 days
Slide 20 - Quiz
The cycle is for everyone the same. It is always 28 days.
A
True
B
False
Slide 21 - Quiz
How do we call the release of an egg cell into the oviduct?
A
Fertilization
B
Ovulation
C
Pregnancy
D
Contraceptive
Slide 22 - Quiz
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 - Quiz
Explain why they talk about 38 weeks pregnancy instead of 36 (9 months) counting from your last menstruation