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Comprehensive and Detailed Explanation:

Neutrophils are the first leukocytes to arrive in large numbers after injury. They phagocytose bacteria and foreign debris, release antimicrobial enzymes and reactive oxygen species, and secrete cytokines that recruit additional inflammatory cells. Their peak activity occurs within the first 24–48 hours. Fibroblasts dominate the later proliferative phase. Keratinocytes restore the epidermal barrier. Melanocytes produce pigment and have no major role in acute phagocytosis. Knowledge of sequential cellular involvement allows the clinician to interpret wound appearance (e.g., persistent neutrophil-rich exudate may signal ongoing infection or biofilm) and to time interventions appropriately. In the Wound Healing Environment domain, understanding why neutrophils are essential yet must give way to macrophages for healing progression is critical for managing both acute and chronic wounds.