'Specialized white blood cells called lymphocytes begin as this type of cell in the bone marrow'
a stem cell
BLOOD WORK: Specialized white blood cells called lymphocytes begin as this type of cell in the bone marrow
Specialized white blood cells called lymphocytes begin as this type of cell in the bone marrow
Specialized white blood cells called lymphocytes begin as this type of cell in the bone marrow
BLOOD WORK
a stem cell
BLOOD WORK