ANATOMY

Detailed explanation-1: -The majority of the digestive tract is composed of two muscular layers to allow for peristalsis-that is, the movement of food. The stomach, however, is composed of three layers, and is designed to account for mechanical digestion.

Detailed explanation-2: -Layers of Stomach Wall The three layers of smooth muscle consist of the outer longitudinal, the middle circular, and the inner oblique muscles. Construction of these muscles helps mix and break the contents into a suspension of nutrients called chyme and propels it into the duodenum.

Detailed explanation-3: -This is mechanical digestion, which begins in the mouth with chewing or mastication and continues with churning and mixing actions in the stomach.

Detailed explanation-4: -Mechanical digestion in the stomach occurs via peristaltic contractions of the smooth muscle from the fundus towards the contracted pylorus, termed propulsion.

Detailed explanation-5: -Muscularis externa is the primary muscle of your stomach. It has three layers that contract and relax to break down food.