The basic knowledge from first aid class, we have a chance to know about the type of wound and how to heal in different type of wound. Closed wound is a wound that epithelium tissue is not tear in but under there is blood clot in the tissue such as contusion bruise. Thus, we can only apply some remedy to the wound. Opened wound is abrasion, laceration wound, incision wound, penetration wound, these kind of wound are have to carefully clean and suture.
Moreover they taught us to do the basic CPR. CPR is emergency process for helping people from heart attack, near drowning and someone’s breathing or heartbeat has stopped.