Homework for next Monday 3ºB

For those people that went on a hike in 3ºB, you will have to do the following homework for next Monday:
-Draw the digestive system in you r notebook and label its parts (use the drawing on page 34).
- Define the following words: dentine, pulp, appendix, colon, cardiac sphyncter, pyloric sphyncter. remember to start the definition with a subject "it is a part of... (the tooth..,the small intestine, etc.) or it is a valve... If you have doubts look for the deffinition in an English dictionary on line (www.wordreference.com, www.merriamwebster.com)