Tonsils

1 At 9 seconds the tonsil is like a net that traps the organisms.

2 At 16 seconds the organisms go in and are trapped in the net.

3 At 23 seconds the white blood cells come and fight off the organisms thus causing a soar throat.

All of these thing are also applied the same way with adnoids except insted of a soar throat you get a plugged nose.