Draw and describe the structure of an antibody.

(N/A) Each antibody molecule is $Y$-shaped and consists of four peptide chains: two small chains called light chains $(L)$ and two longer chains called heavy chains $(H)$.
$\Rightarrow$ Therefore,an antibody is represented as $H_{2}L_{2}$.
These chains are held together by disulfide bonds $(-S-S-)$.
Different types of antibodies are produced in our body,such as $IgA$,$IgM$,$IgE$,$IgG$,and $IgD$.
Since these antibodies are present in the blood and other body fluids,the immune response mediated by them is called the humoral immune response.