4.2 reproduction

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BiologieMiddelbare schoolvwoLeerjaar 2

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Welcome everyone 
 Think about...
  • Book (laptop) + notebook, pen on the table. Bag on the floor.
  • Sit in your own place.
  • 5 minutes.
timer
5:00

Slide 1 - Diapositive

schedule 
  • Repetition                                 
  • Explanation 4.2               
  • video                                               
  • Doing assignments                
  • Closing                                        

Slide 2 - Diapositive

Learning goals 4.2
  • 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 - Diapositive

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

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

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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. 

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

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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'.


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Female Reproductive System

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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.  

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Slide 16 - Vidéo

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.
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Make assignments
paragraph 4.2: assignments 1 until 8
finished? read paragraph 4.3 



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