Why is B cell called a B cell?

B lymphocyte was named after bursa of fabricius

B cells are named after bursa of fabricius. It is a specialized organ in birds that is the site of maturation of B cells.

Mammals generally do not have an organ “specially” made for development of B cells. We have our lovely bone marrow which is both the site of hematopoiesis and B cell development.

Coincidentally, bone marrow starts with a B as well =D

So historically, the credit for giving B cell it’s name goes to bursa of fabricius.. Not our bone marrow! T_T