1. RAT DISSECTION Image from: http://www.animationlibrary.com

2. Mammals lived at same time as dinosaurs; mammals spread out when dinosaurs became extinct

3. RAT LATIN meaning KINGDOM _____________ PHYLUM ____________________________ SUBPHYLUM ___________________________ CLASS _______________________________ ORDER _____________________________ ANIMALIA CHORDATA VERTEBRATA “backbone” Mammalia “breast” RODENTIA “to gnaw”

4. VIBRISSAE EXTERNAL NARES PINNA

5. MAMMARY GLANDS

6. EXIT OPENINGS

7. DIAPHRAGM Divides coelom into: THORACIC CAVITY heart & lungs ABDOMINAL CAVITY digestive, excretory, reproductive organs

9. Image from: http://www.utm.edu/~rirwin/RatAnat.htm

12. TRACHEA BRONCHI LUNGS Cartilage rings Left lung smaller makes room for heart

13. Image from: http://www.utm.edu/~rirwin/RatAnat.htm

14. http://www.eschs.k12.nm.us/Bio2/2k3-4/white_rat_dissection.htm

15. HEART

16. Image from: http://www.utm.edu/~rirwin/RatAnat.htm

23. KIDNEYS