Lesson 3: Sexual development

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

Get ready: 

-LessonUp

-HW female reproductive system

Answers

• 1. oviduct (fallopian tube): transports the ova to the uterus
• 2. ovary: produces the ova (eggs) and the hormones estrogen and progesterone
• 3a. uterus: is like a large sack that holds the developing baby
• 3b. uterus wall: thick wall on the outside of the uterus made of muscles
• 3c. cervix: the entrance to the uterus from the vagina
• 4. vagina: the opening of the woman's body where the penis fits in.
• 5. hymen: the half-open covering to the entrance of the vagina.
• 6. bladder: store urine that comes from the kidneys

Answers

• 7. urethra: the tube that move urine out of the body
• 8. clitoris: the sensitive part of the female reproductive system, this works the same as the glans with men.
• 9. inner labia: produces mucus to protect the reproductive organs and also lubricates the area during sex.
• 10. outer labia: this helps protect the reproductive organs.

Reproduction

Lesson 3: Sexual development

Learning goals lesson 3

1. You can explain the difference between primary and secundary sexual characteristics

2. You can give examples of both in females and males

3. You can explain the role of testosterone & estrogen in sexual development

Sexual development

• Primary sexual characteristics: characteristics that you are born with
• Secondary sexual characteristics: develop later in life, usually during puberty

   Caused by the production of hormones

What are hormones?

• These are chemicals that slowly change things in our bodies
• They are transported through our blood

Male secondary sexual characteristics

Hormone = testosterone

• Growth of hair
• Growth of penis and testicles
• Enlargment of Adam's apple
• deepeing of the voice
• Increased muscles and strength
• Increased secretions of oil and sweat -> acne & body odor

Female secondary sexual characteristics

Hormone = Estrogen (& progesterone)

• Breasts and nipples grow bigger
• Body hair 
  
• Widening of the hips
• More fat deposists (thighs, hips and buttocks)
• Ovulation and menstruation start
• Increased secretions oil and sweat -> odor and acne

Which characteristics are present at birth?

1. Primary sexual characteristics
2. Secondary sexual characteristics

Which characteristics develop during puberty?

1. Primary sexual characteristics
2. Secondary sexual characteristics

How do organisms develop secondary sexual characteristics?

1. Under the influence of hormones
2. Under the influence of the weather
3. Under the influence of gravity

What is a primary sexual characteristic of a man?

1. a beard
2. stronger muscles
3. a penis
4. stronger body smell

What is a primary sexual characteristic of a woman?

1. breasts
2. menstruation
3. a vagina
4. stronger body smell

Contraceptive assignment

• What is the name of your method? 
• Who uses it? (male female or both)
• How does it work?
• How do you use it? 
• What is the effectiveness of the contraceptive method (what is the chance of getting pregnant when you are using this method? 
• Does it prevent people catching a sexually transmitted disease? 
• Where can you buy it? 
• what are the advantages & disadvantages? 
• mention your sources (where did you find the information?)

Contraceptive assignment

A. INDIVIDUAL: make a brochure  (A4 front AND back) about a contraceptive, in which the following aspects should be covered. 

B. IN PAIRS: make a infomercial (video) about a contraceptive, in which the following aspects should be covered. 5-10 min.

Further instructions are on page 22 of the Ibook. 

Choose your topic today, fill in the google form via classroom! 

Topics: 

• The pill
• Abstinance
• The morning after pill
• Diaphragm
• IUD
• Female condom
• Condom

-Done? -> Start with the HW for lesson 4

Next lesson: The menstrual cycle