Ch5.1 2TTO

During this lesson, we will move towards Chapter 5. You will get a short introduction, an overview of the chapter, and we will discuss the first paragraph.
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Slide 1: Tekstslide
BiologieMiddelbare schoolvwoLeerjaar 2

In deze les zitten 39 slides, met interactieve quizzen, tekstslides en 4 videos.

time-iconLesduur is: 45 min

Onderdelen in deze les

During this lesson, we will move towards Chapter 5. You will get a short introduction, an overview of the chapter, and we will discuss the first paragraph.

Slide 1 - Tekstslide

Lesson goals
  • You have an overview of Chapter 5
  • You can explain what reproduction is and what its function is
  • You can explain what hormones and glands are
  • You can explain what the difference is between sexual and asexual reproduction
  • You can explain what primary and secondary sexual characteristics are

Slide 2 - Tekstslide


Slide 3 - Tekstslide

Paragraphs of chapter 5
  1. Reproduction and hormones
  2. The male reproductive system
  3. The female reproductive system
  4. The menstrual cycle
  5. Human fertilisation
  6. Pregnancy
  7. Childbirth
  8. Birth control
  9. Sexually transmitted infections

Slide 4 - Tekstslide

Overview of chapter 5
  • First, we will go into what reproduction is, and what body parts are involved by reproduction
  • Later on, we will discuss how all reproductive processes in our bodies work (menstruation, fertilisation, pregnancy, ...)
  • Afterwards, we will discuss how to prevent unwanted pregnancies, and how to keep your reproductive system healthy
  • As soon as you have a broad knowledge about the reproductive system, we will go into the more 'cultural' aspects of reproduction
Reproduction = the process by which new individual organisms are produced from their "parents". 
Fertilization = bevruchting

Slide 5 - Tekstslide


Please note that we will go into some subjects deeper than the book does, so keep an eye on these lessons so you don't miss a thing!
I will indicate on the slide when there is something that is not in the book.

In between the slides there will be questions that you need to answer, so pay attention to all the slides and videos!

Slide 6 - Tekstslide


Slide 7 - Tekstslide

  • Reproduction (or procreation, breeding) = the biological process by which new individual organisms ("offspring") are produced from their "parents''

Slide 8 - Tekstslide

Why reproduction?
  • Every living thing eventually dies. Organisms need to make more of themselves otherwise there would be no life on Earth at all! 

Who reproduce?
  • All living organisms

Slide 9 - Tekstslide

Two types of reproduction:
  1. Sexual reproduction (two 'parents' --> one 'child')
  2. Asexual reproduction (one 'parent' --> one 'child')

For more info, see the video on the next slide (ignore the part about chromosomes and genetic variety, we will do that next year)
This is not discussed in the book, but still very important to know!

Slide 10 - Tekstslide

Slide 11 - Video

Humans reproduce

Slide 12 - Quizvraag

Explain what the difference is between sexual and asexual reproduction

Slide 13 - Open vraag

Introduction to Dolly
To get a better understanding of the differences between aseksual and seksual reproduction, there will be some questions about the first cloned sheep ever: Dolly. But first watch the video about Dolly!

Slide 14 - Tekstslide

Slide 15 - Video

Is Dolly born after seksual or aseksual reproduction?

Slide 16 - Quizvraag

As you just saw: Dolly was created by aseksual reproduction as there was not a recombination of genetic information of 2 'parents'. Normally, sheep reproduce seksual. Explain how they do that and what the difference is with Dolly.

Slide 17 - Open vraag

The reproductive system
Contains all the organs needed for an organism to be able to sexually reproduce. This system is regulated by hormones.

Slide 18 - Tekstslide

= regulatory substances that control processes in the body
  • They do that by giving signals to organs (messengers)
  • Produced by hormone glands from the endocrine system
  • Transported by the circulatory system to get them where they need to be
  • Effect can have a duration of hours up until months/years
Dutch for glands = klieren
Hormones are messengers. However, that was the task of the nervous system, right? The difference: the nervous system is for the fast messages (to help you feel and move), the hormones are for the slower messages (to help you grow and change). 

Slide 19 - Tekstslide

Slide 20 - Video

Match the glands with their functions!
Pituitary gland
Thyroid gland
Adrenal glands
Ovaris and testis
Master gland as it controls several other hormone glands
Regulate the body's metabolic rate
Response to stress
Regulates blood sugar levels
Regulates puberty and produce sex hormones

Slide 21 - Sleepvraag

Sex hormones
  • Hormones that work in the reproductive system are called sex hormones
  • Some of those are different for males and females
  • Production of these leads to the differences between male and female bodies
  • This production happens in many stages of life!

Slide 22 - Tekstslide

Stages of life
During life, the body goes through several changes. Some of these changes have to do with sex hormones

Slide 23 - Tekstslide

Primary sexual characteristics
  • During the pregnancy, the sex hormones are responsible for the baby developing male or female reproductive organs.
  • The organs that are present at birth are called the primary sexual characteristics
  • Examples: penis, vagina, prostate, uterus, ...

Slide 24 - Tekstslide

Secondary sexual characteristics
  • When the child reaches puberty, sex hormones are produced to develop the secondary sexual characteristics. 
  • These are processes and structures that develop throughout puberty. When someone has developed everything, they have reached the end of puberty
  • Examples: menstruation, facial hair, lower voice, ...

Slide 25 - Tekstslide

Now to test if you understood this..
A few questions!

Slide 26 - Tekstslide

Are the female ovaries a primary or a secondary sexual characteristic?

Slide 27 - Quizvraag

Is the development of pubic hair (click ? for Dutch) a primary or a secondary sexual characteristic?
Pubic hair = schaamhaar

Slide 28 - Quizvraag

Difficult question: One of the male secondary sexual characteristics is the development of more muscles. Explain how this can be (mis)used in professional sports in adult men and women.

Slide 29 - Open vraag

What do you think would happen if a female person would take male sex hormones for a longer period of time?

Slide 30 - Open vraag

Regulation of reproductive system by hormones

The regulatory system is regulated by hormones. Mostly oesterogen (in females) and testosteron (in men). The release of these hormones is controlled by the pituitary gland. During early pregnancy the women also produce progesteron to prepare for the implantation of the embryo in the mucous membranes.
implantation = innesteling

mucous membranes = baarmoederslijmvlies
This is not discussed in the book, but still very important to know!

Slide 31 - Tekstslide

Slide 32 - Video

Oestrogen is responsible for:
primary sexual characteristics in females
secondary sexual characteristics in females
primary sexual characteristics in males
primary sexual characteristics in males

Slide 33 - Quizvraag

Only males produce testosteron?

Slide 34 - Quizvraag

Which gland regulates the production of oestrogen and testosteron?
Pituitary gland (Hypofyse)
Testis (teelballen)
Ovaries (eierstokken)

Slide 35 - Quizvraag

Where is oesterogen mainly produced?
Testis (teelballen)
Ovaries (eierstokken)

Slide 36 - Quizvraag

What does testosteron NOT stimulate?
Primary seksual characteristics
Secundary seksual characteristics
Sperm cell production
Puberty in boys

Slide 37 - Quizvraag

The hormone progesterone is secreted during early pregnancy and prepares the uterus for pregnancy

Slide 38 - Quizvraag

That was it! Homework:
  • Take notes of this lesson, as well als everything in the book that we didn't mention here
  • Complete questions 1, 2 and 3 from your workbook (page 100 and 101)
  • Read paragraph 5.2 and 5.3

Slide 39 - Tekstslide