skin is your first line of defense. White blood cells also seek out and kill harmful intruders
lmphocytes and phagocytes
A sponge's defenses are spikes in the sponges body.
fight or flight
Phagocytosis
The first six lines defenses of the body are mucous membrane, skin, chemicals, pH, hair, and cilia.
Resistance.
Their stripes act as camouflage
blah
lymph
Your body is really a possible large dinner table for pathogens that are found everywhere. You need as many defenses as you have to fend them off.
Dragon types are best against other dragon types and pokemon with low defenses.
1. Sea walls 2.Rip-rap 3.Revetments 4. Groynes 5.Gabions