$MALT$ constitutes about . . . . . . percent of the lymphoid tissue in the human body.

In an autoimmune disease,.........

$A$ molecule that elicits an immune response is called

Arrange the steps of the $phagocytosis$ process in the correct sequence.
$(a)$ Ingestion of microbes by phagocytes
$(b)$ Dilation of blood vessels by histamine
$(c)$ Formation of $phagosome$ and $phagolysosome$
$(d)$ Migration of phagocytes into $E.C.F.$
$(e)$ Attraction of phagocytes by $chemotoxins$ secreted by microbes
$(f)$ Intracellular destruction of bacteria

Name the primary and secondary lymphoid organs.

Anamnestic immune response is $ - $