Final answer:
T lymphocytes are the only formed elements of blood that do not develop entirely within the bone marrow; they begin their development there but migrate to the thymus for maturation, in contrast to neutrophils, erythrocytes, platelets, and basophils that fully develop within the bone marrow.option e is correct answer.
Step-by-step explanation:
All of the following types of formed elements develop entirely within the bone marrow EXCEPT: a. Neutrophils b. Erythrocytes c. Platelets d. Basophils e. T lymphocytes. Among the choices provided, T lymphocytes are the formed elements of blood that do not develop entirely within the bone marrow.
Lymphoid stem cells, unlike myeloid stem cells which give rise to most other formed elements including neutrophils, erythrocytes, platelets, and basophils, produce lymphocytes which include B cells, T cells, and natural killer (NK) cells. These lymphoid cells differ in their maturation process; while B cells mature in the bone marrow, T cells primarily mature in the thymus after their initial formation in the bone marrow.
The process of hematopoiesis in the red bone marrow involves hemopoietic stem cells differentiating into lymphoid and myeloid lineages. Lymphocytes are the only formed elements that arise from lymphoid stem cells and include T cells, which are essential for the immune response.