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For any one cell the cytokine-secreting activation state is short-lived, lasting between 4 - 40 hours. After this time these cells either die, or mature into the long-lived memory cells. The proliferation of T cells continues until antigen disappears.
For any one cell the cytokine-secreting activation state is short-lived, lasting between 4 - 40 hours. After this time these cells either die, or mature into the long-lived memory cells. The proliferation of T cells continues until antigen disappears.
==Dendritic Cells==
*Dendritic cells present antigen to [[Lymphocytes - WikiBlood#T cells|T cells]]
*Circulating monocytes differentiate to form immature dendritic cells called '''Langerhans Cells'''
*Langerhans cells sample the tissue fluid by endocytosis
**Foreign organisms are internalised
*The Langerhans cells leave the epithelium and travel via the afferent lymph. They are now called '''Veiled Cells'''
*Veiled cells enter the paracortical region of the [[Lymph Nodes - Anatomy & Physiology|lymph node]] where they present antigen to [[Lymphocytes - WikiBlood#T cells|T cells]]. They are now called '''Interdigitating Dendritic Cells'''
===TH<sub>1</sub> Cells===
===TH<sub>1</sub> Cells===