The Body's Secondary Line of Defense

Question 1

Anti-Toxins

Answer 1

The white blood cells produce anti-toxins and release them.

When the anti-toxin meet with the toxins, the anti-toxins neutralise the toxins leaving them harmless.

Question 2

Anti-Bodies

Answer 2

1. Pathogens enter the body.
2. The B-lymphocytes make anti-bodies.
3. Antibodies help destroy pathogens by latching on to the antigens.
4. The pathogens are now harmless as their antigens can’t stick onto cells.

Question 3

Phagocytosis

Answer 3

The white blood cells will engulf the bacteria.

Once inside, the white blood cell will kill the bacteria.