4.1/4.2 reproduction

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
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Slide 1: Tekstslide
BiologieMiddelbare schoolvwoLeerjaar 2

In deze les zitten 17 slides, met tekstslides en 1 video.

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 
  • Repetition                                 10 min.
  • Explanation 4.1/4.2               10 min.
  • video                                            5 min.   
  • Doing assignments              15 min      
  • Closing                                        5 min. 

Slide 2 - Tekstslide

Learning goals 4.1 +4.2
  • What are the two main types of reproduction and what are advantages and disadvantages of these types of reproduction?
  • Which organs make up the male reproductive system?
  • Where do male sex cells form and develop?
  • Which organs make up the female reproductive system?
  • Where do female sex cells form and develop?

Slide 3 - Tekstslide

Reproduction
  • Reproduction (or procreation, breeding) = the biological process by which new individual organisms ("offspring") are produced from their "parents"
  • Without reproduction, there would not be as much life possible as we have now

Slide 4 - Tekstslide

Talking point 4.1

Discuss with another student what could happen if humans could reproduce asexually? What would be an advantage and what would be a disadvantage?

timer
3:00

Slide 5 - Tekstslide

Reproduction
Two types of reproduction:
  1. Sexual reproduction: fusion of gamets required                            - Lots of variety         
  2. Asexual reproduction: no gamets needed                                         - No variety 

Slide 6 - Tekstslide

Slide 7 - Tekstslide

Slide 8 - Tekstslide

Slide 9 - Tekstslide

Slide 10 - Tekstslide

Sperm or semen?
-Testes produce sperm cells.
-Epididymes store sperm cells-->release during orgasm.
-seminal vesicles+ prostate add fluid and nutrients--> activate sperm. Fluid=semen. 

Slide 11 - Tekstslide

Erections
-Blood vessel to erectile tissue relaxes (muscle).
-Blood fills erectile tissue-->penis becomes erect (hard).
-Erections can happen any time, uncontrolled. Especially during puberty.

Slide 12 - Tekstslide

Ejaculation
-Ejaculation is male orgasm.
-Amount of semen: average tea spoon of semen.
-Sperm cell 3 parts: head with nucleus, midpiece with energy, tail for 'swimming'.


Slide 13 - Tekstslide

Female reproductive system
  • In the ovary eggs are ripen in a follicle.
  • After ovulation (eruption of follicle)                                                    an eggs goes into the oviduct.
  • Possible fertilaztion happens in  
the fallopian tube (oviduct).
  • No fertilization? Menstruation starts.  

Slide 14 - Tekstslide

Slide 15 - Video

Talking point 4.2

Bacteria that enter through the urethra and travel into the bladder can cause a bladder infection. Discuss with a student why bladder infections are more common in females than in males.
timer
3:00

Slide 16 - Tekstslide

Make assignments
paragraph 4.1: 1 assignments 
paragraph 4.2: assignments 1 until 7 
finished? read paragraph 4.3 



timer
10:00

Slide 17 - Tekstslide