tissue
Thymus Immune Ecosystem
Central tolerance and T-cell education organ where endocrine signals, epithelial niches, and selection thresholds shape the T-cell repertoire
Review layer
Last reviewed 2026-05-17
Systems teaching draft. Content is structured for education and graph expansion, with formal source tagging ready for the next review pass.
State signature
Systems profile
Tissue ecosystem
Spatial immune niche
niche
Thymus
Barrier
Cells
Cytokines
Neuroimmune
Graph neighborhood
Direct relationships
Thymic selection generates naive CD4 T cells and shapes central tolerance
Thymic selection contributes natural Treg output for tolerance
Immune niche
Tissue Ecology
The thymus is not just a lymphoid organ; it is a developmental immune checkpoint where thymic epithelial cells, dendritic cells, macrophages, and hormones tune positive selection, negative selection, Treg output, involution, and immune aging.