Male reproductive system

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

Welcome to this lesson!

• Please take your seat
  
• Take off your coat
  
• Get you notebook , book and pen

Student questions from last week

How does the menstrual cycle work? - This will be discussed in one of the later lessons

Student questions from last week

When should you have Sex for the first time?

There isn't one age at which you should have sex.

Instead it should be something you do once both you and the other person are 100% sure you want to have sex. 

It should be with someone you feel safe with.

Age at which 50% of adolescents have had sex

What is the difference between primary and secondary sexual characteristics?

Which of the following is NOT a secondary sexual characteristic?

1. Menstruation
2. Pubic hair
3. Sex hormones
4. Muscle growth

Name 2 changes that happen during puberty: 1 mental change & 1 physical change.

Male primary sex
characteristics

Male secondary sex
characteristics

Internal male reproductive system

•  Testes: 
• Makes the sperm cells
• Scrotum: 
• Protects testes and has a lower temperature, which is good for sperm cell production. 
• Epididymis: 
• Temporary storage for sperm cells.
• Sperm duct: 
• Transports the sperm cells.

Internal male reproductive system

• Seminal vesicle: 
• Adds fluid with nutrition to the sperm cells. 
• Prostate: 
• adds fluid to sperm cells. 
• Fluids + sperm cells =  called...?
• semen.
•  Urethra: 
• Transports urine + semen to outside.

• When does the testes start to function? (average)

• What is responsible for this change? 

• Why is it important to clean the foreskin of the penis?

• What is the reason to cut away the foreskin for some people?

Sperm or semen?

-Testes produce sperm cells.

-Epididymes store sperm cells-->release during orgasm.

-seminal vesicles+ prostate add fluid and nutrients--> activate sperm.

Semen = Fluid + sperm cells 

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.

- Tip from the internet on how to get rid of an unwanted boner: Flex (contract) your thigh muscles for atleast 30 seconds

Ejaculation

-Ejaculation is male orgasm.

-Amount of semen: average tea spoon of semen (100-400 million sperm cells)

glans    foreskin

erictile tissue

sperm duct

urethra

epididymis

testis

scrotum

prostate

seminal vesicle

Through which parts, and in what order do sperm cells exit the male body

glans    foreskin

5

2

4

1

3

Question box: Ask any questions you have