必修五UNIT5公开课.ppt

* * a snake bite bleeding a sprained ankle choking a broken arm a nosebleed What has happened? Thinking: The girl has pulled boiling water onto herself. Can you guess what will happen to the girl? She will get burnt. How will we deal with the burn? First aid for burns Fast Reading In which order are these topics covered in the text? Number them from 1 to 5. _____ the three types of burns _____ what to do if someone gets burned _____ the functions of skin _____ the symptoms of burns _____ how we get burns 3 5 1 4 2 First Aid For Burns Part 1: The functions of skin There are ______ layers of skin. three The skin is the ________ organ, and also very __________. Protect you against _________, _________ and _______________________; 2) Keep you ________ or ________; 3) Prevent you from ______________; 4) Give you _____________. diseases largest essential poisons the sun’s harmfulrays warm cool losing water sense of touch Careful Reading Part 2 Causes of burns How can you get burned? H2SO4 hot liquids steam fire the sun chemicals Part 3 Types of burns There are ______types of burns depending on which ______ are burned. First degree burns affect only the ___layer and should feel better within ____________. Second degree burns affect both the ___ and the ______ layer. These burns are _______ and take ___________ to heal. Third degree burns effect layers. These burns cause very injuries. three layers top a day or two top second serious a few weeks all three severe Types of burns Characteristics B A C Extremely painful Mildly swollen Tissue under them often can be seen. Read part 4 second degree burn first degree burn third degree burn * *