ANATOMY

Detailed explanation-1: -Proper digestion requires both mechanical and chemical digestion and occurs in the oral cavity, stomach, and small intestine.

Detailed explanation-2: -Most mechanical and some chemical digestion occur in the stomach. Mechanical digestion occurs as layers of muscle in the stomach lining contract to produce a mixing and churning motion. Chemical digestion is carried out by stomach juices that contain enzymes and hydrochloric acid.

Detailed explanation-3: -Mechanical digestion begins in your mouth with chewing, then moves to churning in the stomach and segmentation in the small intestine. Peristalsis is also part of mechanical digestion.

Detailed explanation-4: -The main chemical digestion processes in the stomach occurs through the action of gastric juices. Gastric juice contains the enzyme pepsin (secreted as pepsinogen), which hydrolyses the chemical breakdown of proteins.

Detailed explanation-5: -The main organs that make up the digestive system (in order of their function) are the mouth, esophagus, stomach, small intestine, large intestine, rectum and anus. Helping them along the way are the pancreas, gall bladder and liver. Here’s how these organs work together in your digestive system.