From this lecture i learned about

1. digestive system which is divided into two major parts alimentary canal and accessory organs

2.Function of digestive system 

3.layer of GIT 

4.glands in oral cavity or salivary glands

5.function of saliva

6.description of teeth,tongue, esophagus, pharynx,stomach, liver, pancreas, gallbladder, bile

7.parts and function of intestine