Physical digestion is when the food molecules are broken down into smaller pieces by the digestive systems organs to enable it to be processed by the body.
Chemical digestion occurs when special chemicals called enzymes break down the already small molecules even smaller. From there three chemical reactions take place, depending on what food type is being digested.
Protein: The protein contained in the burger enters the mouth where the teeth grind and chew it into smaller pieces. This is physical digestion. It then enters the stomach, which is where the digestive process begins. The presence of food in the stomach stimulates the stomach walls to produce gastric juices containing a hydrochloric acid, mucus and enzymes called pepsin and protease, which begins the digestion of the proteins. The hydrochloric acid provides acidic conditions needed for the enzyme protease. This is also known as chemical digestion.…
