Digestive System

1. Necessary Organs

a. Oral cavity- It is the cavity of mouth, irregular in shape, contains tongue, teeth and salivary 

glands,

b. Esophagus-Muscular tube passing the food from pharynx to stomach

c. Stomach-Muscular, hollow and dialted part of alimentary canal, involved in both mechanical 

and chemical digestion of food, secretes strong acid and enzymes to aid in digestion of food

d. Small Intestine-Lies between stomach and large intestine, majority of digestion and 

absorption takes place here, About 5 meters in length

e. Large Intestine-Second-to-last part of alimentary canal, main function is to absorb water 

from indigestible food.

f. Anus-Last part of alimentary canal, opens to outside for ejestion of food, Controls the 

expulsion of feces

2. Accessory Organs a. Liver-Produces bile for emulsification of fats

b. Pancreas-Secretes pancreatic juice containing different digestive enzymes into the small 

intestine

c. Teeth- Chewing and mastication of food d. Tongue-Rolling and lubrication of food

3. Functions- Digestion and absorption of food