Really pay attention to the descriptions of the codes in the tabular. If you need to back up and look at the comments at the beginning of the chapter you should. There might be information regarding the global package. This is so in the integamentary section as well as others. I did not look up this code though so am just talking off the top of my head again. When you are new to testing or just coding always look around the code to confirm you are getting all the information you need.