An open wound is an injury in which there is a break in the skin that exposes tissue and causes bleeding. There are different classification of open wounds, such as an abrasion, puncture, incision, laceration and avulsion, according to Healthline. The most serious of these wound types are incision and avulsion wounds, which can involve rupturing of skin and exposure of tissues. Avulsion wounds can include gunshot wounds. These types of wounds require medical attention, especially when muscles, tendons or organs are damaged due to the injury.
Sources: webmd.com, healthline.com