This is a powerpoint presentation for Excretion with a focus on the Urinary System and its role in maintaining homeostasis. The presentation can be used with guided notes included in another product. I have also included some links to websites which contain pictures and illustrations which can be used as a supplement to the presentation. Many slides have notes for instructor on my thoughts on discussion topics for that slide. Also are two links to videos that I use in class. One for a laser procedure to treat kidney stones. The video does have blurred segment due to a ureteroscope being placed for the procedure. Another video which shows how lithotripsy is used to break up kidney stones. Some of the slides are a review for a part that I allow the students to be involved in a cooperative learning segment on the formation of urine. I have my students use the Anatomy Coloring Book by Kapit and Elson for illustrations of the anatomy. I am listing this for Higher Education as well due to students who I have had in the past who were dual enrolled at local community colleges and stated that we covered the same material in their classes. The teaching duration is based on a high school 4x4 schedule.