IMMUNOGLOBINS:- (produced by B lymphocytes) (G-A-M-E)

 IgG
— most abundant Ig in blood and in GCF
— passive immunity through placenta

 IgA
— all secretion of body contains this eg: saliva (lacrimal)
— passive immunity through milk (colestrum breast milk)

 IgM
— first Ig to reach site of infection

 IgE
— abundant in allergy and anaphylaxis