Topic of this presentation is Types of Immunity First of all we will discuss some important terms Ability of our body to fight against disease causing pathogens is called immunity And Body system which is engaged in providing immunity to the organism is called immune system This system develops immunity
the immune system is the body’s defense system it protects the body from disease-causing organisms called pathogens the protection has several layers first invading pathogens meet with a number of surface barriers which consist of physical chemical and biological obstacles designed to keep them out the primary physical barrier is
Sex and not dying. That’s what biology is all about. And while the sex part is, I’ll grant you, a little bit sexier, not dying is also really fantastic… something that I, personally, like to do every single day. I, personally, like to not die in all sorts of ways.