Which term denotes the tissue within lymph nodes that supports immune function?

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Multiple Choice

Which term denotes the tissue within lymph nodes that supports immune function?

Lymphatic tissue is the part of the lymph node that houses immune cells and organizes their interactions, making it the tissue that truly supports immune function. This tissue includes B-cell–rich follicles and T-cell–rich zones, along with macrophages and dendritic cells, all arranged to trap antigens and coordinate responses like activation, proliferation, and antibody production. The other terms describe structures or spaces not responsible for the immune-supporting tissue within the node: the interstitium is the surrounding extracellular space, endothelial cells line the vessels rather than forming the functional lymphoid tissue, and valves in lymph vessels regulate flow but are not tissue inside the lymph node.

Lymphatic tissue is the part of the lymph node that houses immune cells and organizes their interactions, making it the tissue that truly supports immune function. This tissue includes B-cell–rich follicles and T-cell–rich zones, along with macrophages and dendritic cells, all arranged to trap antigens and coordinate responses like activation, proliferation, and antibody production. The other terms describe structures or spaces not responsible for the immune-supporting tissue within the node: the interstitium is the surrounding extracellular space, endothelial cells line the vessels rather than forming the functional lymphoid tissue, and valves in lymph vessels regulate flow but are not tissue inside the lymph node.

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