Spleen is

Discribe the Innate immunity.

The thymus is a lobed organ located near the $...A...$ and beneath the $...B... $ The most appropriate combination for $\mathrm{A}$ and $\mathrm{B}$ is

Define : Autoimmunity

What are the two corollaries related to immune system ?

Humans have acquired immune system that produces antibodies to neutralize pathogens. Still innate immune system is present at the time of birth because it