1.Tongue -chew , swallow , identify the taste, mixes food with saliva to digest carbohydrates and helps us to speak
2. Stomach - It secretes hydrochloric acid and various enzymes that helps our food to digest the proteins.
3. Small Intestine - It's function is absorption of nutrients and minerals through finger like projections called villi.
4. Large Intestine - It main function is to absorb water from the remaining roughage