Immune System part 2

• Biologie
• Middelbare school
• havo
• Leerjaar 2

Today's Lesson

1. Review Excretion (paragraph 3,6)

2. Do: Immune System (paragraph 3,7)

3. Discuss SO

What is the name of part 1?

1. Renal cortex
2. Renal medulla
3. Renal pelvis
4. Ureter

What is the name of part 3?

1. Renal cortex
2. Renal medulla
3. Renal pelvis
4. Ureter

Where does part 6 lead to?

1. Bladder
2. Urethra
3. Outside
4. Ureter

What is the name of part 2?

1. Renal cortex
2. Renal medulla
3. Renal pelvis
4. Ureter

What is not a part of Urine?

1. Salt
2. Water
3. Waste products
4. Blood

3.7

The immune system

Immune system?

The immune system

Protects against foreign bodies/ pathogens

 Pathogens = viruses and bacteria

Infection = when a pathogen enters the body

Pathogen

Contains DNA (inside)

Has antigens (on the outside)

Natural immunity

1. A pathogen enters your body.

2. You get sick.

3. Your body makes antibodies.

4. You get better.

5. The white blood cells "remember" how these antibodies were made. 

6. The next time the pathogen enters, antibodies are made immediately in large amounts.

7. You are immune.

8. Example: Chicken pox

Artificial immunity

1.  Otherwise known as vaccination.

2. You receive a dead or weakened pathogen via an injection. This is known as a vaccine.

3. Specific white blood cells make antibodies.

4. You get a little bit sick.

5. When the pathogen enters again, your bodies make antibodies immediately and in large amounts. 

6. You are immune and will not get sick. 

What questions do you still have about the immune system?

Homework

Exercise 31, 32 & 33

Test yourself (3.7)