Final answer:
Granulocytes like neutrophils are produced by the myeloid stem cell line during hemopoiesis in the red bone marrow.
Step-by-step explanation:
In hemopoiesis, granulocytes such as neutrophils are formed from the myeloid stem cell line. Hemopoiesis is the process by which all the formed elements of blood are continually produced in the red bone marrow. Myeloid stem cells are a type of hemopoietic stem cell that gives rise to several formed elements, including erythrocytes (red blood cells), megakaryocytes that produce platelets, monocytes, and three forms of granular leukocytes: neutrophils, eosinophils, and basophils. Neutrophils are the most abundant type of granular leukocytes and, along with the other granulocytes, they originate from the myeloid stem cells.