**4. Cell delivery systems in wound healing**

Wound healing involves the coordinated efforts of several cell types, including keratinocytes, fibroblasts, endothelial cells, macrophages, and platelets. The migration, infiltration, prolifer‐ ation, and differentiation of these cells will culminate in an inflammatory response, the formation of new tissue and ultimately wound closure [39]. Cell‐based therapies for wound repair are limited by inefficient delivery systems that fail to protect cells from acute inflam‐ matory environments [61]. Wound dressing of cells laden in biomaterials on wound surfaces might not effectively and timely exert functions on deep or chronic wounds, where insufficient blood supply presents. Therefore, cell delivery systems are the main focus in the cell‐based therapeutic field. Cell, including stem cells and other cells, delivered wound dressings have recently shown great promise for accelerating wound healing and reducing scar formation.
