Ang immune system ng tao ay binubuo ng mga cell, protina, at mga organo na nagtutulungan upang labanan ang sakit.
© Chloroformzt Official - Est 2009
10 Kawili-wiling Katotohanan About The science of the human immune system and how it fights disease

10 Kawili-wiling Katotohanan About The science of the human immune system and how it fights disease