Which of the following is a primary lymphoid organ?Lymph nodesBone marrowSpleenLymphatic vessels
Question
Which of the following is a primary lymphoid organ?
- Lymph nodes
- Bone marrow
- Spleen
- Lymphatic vessels
Solution
Identifying the Primary Lymphoid Organ
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Understanding Lymphoid Organs
- Lymphoid organs are of two types: primary and secondary. Primary lymphoid organs are where lymphocytes are produced and matured, while secondary lymphoid organs are where these cells mount an immune response.
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Options Provided
- Lymph nodes
- Bone marrow
- Spleen
- Lymphatic vessels
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Analysis of Each Option
- Lymph nodes: These are secondary lymphoid organs where immune responses occur.
- Bone marrow: This is a primary lymphoid organ; it is where B cells mature and where T cells are produced.
- Spleen: Like lymph nodes, the spleen is a secondary lymphoid organ involved in filtering blood and housing immune cells.
- Lymphatic vessels: These are not lymphoid organs; they are part of the lymphatic system that transports lymph.
Final Answer
The primary lymphoid organ from the options provided is Bone marrow.
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