 {| class="wikitable" style="float: right; text-align: center; margin-left: 15px;" |colspan="5"|hand abrasion |- | style="background:white; border-right:0px; border-bottom:0px;" |100px |style="background:white; border-left:0px; border-bottom:0px;" |100px |style="background:white; border-left:0px; border-bottom:0px;" |100px |style="background:white; border-left:0px; border-bottom:0px;" |100px |- |colspan="5"|approximate days since injury |- | style="border-top:0px;"|0 | style="border-top:0px;"|3 | style="border-top:0px;"|17 | style="border-top:0px;"|30 |} wound healing is an intricate process where the skin (or another organ-tissue) repairs itself after injury.nguyen, d.t., orgill d.p., murphy g.f. (2009). chapter 4: the pathophysiologic basis for wound healing and cutaneous regeneration. biomaterials for treating skin loss. woodhead publishing (uk/europe) & crc press (us), cambridge/boca raton, p. 25-57. (isbn 978-1-4200-9989-8/isbn 978-1-84569-363-3) in normal skin, the epidermis (outermost layer) and dermis (inner or deeper layer) exist in a steady-state equilibrium, forming a protective barrier against the external environment. once the protective barrier is broken, the normal (physiologic) process of wound healing is immediately set in motion. the classic model of wound healing is divided into three or four sequential, yet overlapping, phases: (1) hemostasis (not considered a phase by some authors), (2) inflammation, (3) proliferation and (4) remodeling.quinn, j.v. (1998). tissue adhesives in wound care. hamilton, ont. b.c. decker, inc. electronic book. upon injury to the skin, a set of complex biochemical events takes place in a closely orchestrated cascade to repair the damage. within the first few minutes after the injury, platelets adhere to the site of injury, become activated, and aggregate (join together); followed by activation of the coagulation cascade which forms 
Physiology Skin_physiology Trauma_surgery Traumatology