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Neuro-Endocrine-Immune System

Meaning

The Neuro-Endocrine-Immune (NEI) System is an interconnected biological network of the nervous, endocrine, and immune systems. These communicate bidirectionally via shared molecular messengers like neurotransmitters, hormones, and cytokines. This complex communication maintains physiological homeostasis and mediates adaptive responses to stressors. Its coordinated activity is fundamental for health and responding to environmental challenges.