PATHOLOGY

Detailed explanation-1: -Effector B cells can begin secreting antibody while they are still small lymphocytes, but the end stage of their maturation pathway is a large plasma cell (see Figure 24-7B), which continuously secretes antibodies at the astonishing rate of about 2000 molecules per second.

Detailed explanation-2: -In fetuses, the liver makes B-cells. Once you’re born, B-cells develop in the spongy tissue inside your bone called bone marrow. They start as hematopoietic stem cells and eventually become B-cells during a process called hematopoiesis.

Detailed explanation-3: -The B Cells have the ability to transform into plasmocytes and are responsible for producing antibodies (Abs). Thus, humoral immunity depends on the B Cells while cell immunity depends on the T Cells.