BIOLOGY > HUMAN BIOLOGY > DIGESTIVE SYSTEM
EXPLANATION:
In the mouth, physical digestion of the food happens by chewing of the food. In the stomach, the food is broken down by chemical digestion into smaller particles that can be easily absorbed by the body. It will pass through the small intestine first where the microvilli and villi are. Then, most of the undigested and unabsorbed food particles are passed through the large intestine. It will be getting secreted out of the body after.
ANSWER: D. Duodenum is the first section of the small intestine right after the pyloric sphincter.
