How the Digestive System in Human Beings Works | O Level Biology | Unique School System

#DigestiveSystem #Biology #Uniqueschoolsystem

Digestion works by moving food through the GI tract. Digestion begins in the mouth with chewing and ends in the small intestine. As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules.

Step 1: Mouth. To more easily absorb different foods, your saliva helps break down what you're eating and turn it into chemicals called enzymes.
Step 2: Esophagus. ...
Step 3: Stomach. ...
Step 4: Small Intestine. ...
Step 5: Large Intestine, Colon, Rectum, and Anus.

There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.

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