Q: The primary lymphoid organs are the bone marrow and what else?


Read this paragraph and choose the correct option from the provided answers:

Primary Lymphoid Organs and Lymphocyte Development Understanding the differentiation and development of B and T cells is critical to the understanding of the adaptive immune response. It is through this process that the body (ideally) learns to destroy only pathogens and leaves the body’s own cells relatively intact. The primary lymphoid organs are the bone marrow and thymus gland. The lymphoid organs are where lymphocytes mature, proliferate, and are selected, which enables them to attack pathogens without harming the cells of the body.

 Choices:

- pinneal gland

- thyroid

- kidneys

- thymus gland


A:
thymus gland