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A PLEASANT MORNING TO EACH AND EVERYONE! WELCOME BACK TO SCHOOL OUR LOVELY STUDENTS! HAVE A GREAT START FOR YOU ALL!
GOOD MORNING MY STUDENTS! TODAY IS OUR FIRST DAY OF SCHOOL. I WANT TO KNOW YOU ALL. PLEASE INTRODUCE YOURSELVES.
Hello classmates! My name is IgM. I have a key role in the initial immune system defense for protecting the body.
Hi everyone! I am IgA. While in blood, I am the mainly present as monomers (the shape of a single Y), but it forms dimers (a combination of 2 Ys) in secretions such as bowel fluid, nasal discharge, and saliva, to prevent bacterial invasion from a mucous membrane. I am also present in breast milk and protects the gastrointestinal tract of newborns from bacterial and viral infection.
A pleasant day teacher and to my fellow classmates. I am IgD.  I am present on the surface of B cells and  is reported to play a role in the induction of antibody production and the prevention of respiratory tract infections.

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