11.1 man and woman

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Are you ready?

- Put your phone in the phonebag

- Coats are on the coat rack or in your locker

- Bags are off the table

- Take off your hat or hoodie

- Books and laptops are on the table

- Did you do your homework?

 

Enter the code at LessonUp!

Turn your laptop backwards!

Schedule

• Test knowledge
• Instruction

    Fertility men

    Fertility women

    Menstrual cycle

• Homework
• End of class

Learning objectives

You will learn how the reproductive system works, at what stage you become fertile and how the menstrual cycle works.

This Chapter/ this : No PIF words!

What are the reproductive cells of men called?

What are the reproductive cells of women called?

Fertility in boys

Pituitary gland (hypofyse) = important hormone gland attached to the base of the brain.

Voortplantingsorganen, urineblaas en urinebuis

erection = a penis stiffens because blood engorges the erectile tissue

Ejaculation

Epididymis > ductus deferens (sperm ducts) > seminal vesicles > prostate gland > urethra 

Seminal vesicles and prostate: add sperm fluid to the sperm cells

Semen = sperm fluid with sperm cells

Fertility in girls

Approx. 400,000 oocytes present from birth.

Egg cells begin to mature at puberty.

Menstruatiecyclus

(28 dagen)

1. An egg matures in one of the ovaries
   
2. The uterine lining thickens
   
3. Ovulation = release of an egg from an ovary.
   
4. Period

Follicle = vesicle surrounding an egg

Oestrogen has three effects:

1. prevents other egg cells from maturing
   
2. the uterine lining starts to thicken
   
3. if there is a lot of oestrogen present within the blood (the first peak in the graph of figure 10) the pituitary gland gives a signal to start ovulation.

Progesterone stimulates further growth and saturation of the uterine lining

1.  The pituitary gland releases FSH.  FSH stimulates the growth of the ovarian follicle.

2. Growing follicle mainly produces estrogen before ovulation.

- inhibits the production of FSH, preventing new cells from maturing.

3. Due to a lot of estrogen in the blood, the pituitary gland starts to produce LH (luteinizing hormone).The ovulation occurs.

4. After ovulation: LH ensures the growth of the empty follicle (corpus luteum).

5. The corpus luteum produces progesterone.

- inhibits the production of FSH and LH

- egg cells do not mature, ovulation does not occur.

6. Egg not fertilized: production of estrogen and progesterone decreases. Uterine lining breaks down (menstruation).

What?	Make: 11.1 assignments 4, 7, 8,16-18, 20, 22, 24
How?	In your (online) book. Choose: whispering or listening to music on your laptop. Make worksheet assignments in your notebook.
Help?	Raise your hand. If he/she is not listening to music, you may ask your neighbour first.
Time?	10-15 minutes
Finished?	Check your answers. Then make Summarize 11.1.
Proceeds	You have finished your homework! Well done!

Let's discuss the lesson!

Don't pack your bags yet!

What did you learn today?

When de bell rings:

- Pull up your chairs

- Don't forget your phone