circulatory system - 7 - the immune system

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

3.5  The immune system

immune system

- works against pathogens 

- things that do not ........... in your body

- also called ......... / foreign bodies

- virusses, bacteria, fungi and parasites can cause infections

Belong

antigens

Antibodies

- your body produces antibodies against antigens

Antibodies

How does production of antibodies work?

How do antibodies work?

- first of all: an antibody a.............himself to an antigen with his binding side

- this fits per........

attaches 

perfectly

How do antibodies work?

-

What is happening in de figure?

Then other white bloodcells (macrophages) come into action to 'eat' and digest the antigen

active immunity

-natural

Your body encounters the pathogen (eg - chicken-pox) in an infection

-artificial

You receive a vaccination

Vaccination

What is a vaccine?

A vaccine consists of 

-dead or w............. pathogens 

-or a part of a pathogen

eakened

Pox

Small-pox and cow-pox were related

The antigens were very much alike

The antibodies formed against cow-pox also worked against small-pox! (cross-resistence)

vaccination regime

allmost all childeren in the Netherlands receive vaccinations.

 

passive immunity

passive means that you don't do anything

So it means that your body is NOT producing antibodies, but receives antibodie from someone else. 

It generates NO memory.