HUMAN NUTRITION

Detailed explanation-1: -The stomach is a muscular bag and it churns the food to help break it down mechanically as well as chemically. The food is then squeezed through a second sphincter into the first part of the small intestine, called the duodenum.

Detailed explanation-2: -The stomach muscles churn and mix the food with digestive juices that have acids and enzymes. These juices help break up food into much smaller pieces. By the time food is ready to leave the stomach, it has been turned into a thick liquid called chyme (kime).

Detailed explanation-3: -Digestion Defined Mechanical digestion is the physical breakdown of food through chewing, grinding, and muscular or rhythmic contractions. When your stomach churns, it’s using both types of digestion to make sure that partially digested food is small enough to enter the cells of your GI tract, blood and lymph tissue.

Detailed explanation-4: -Ridges of muscle tissue called rugae line the stomach. The stomach muscles contract periodically, churning food to enhance digestion.

Detailed explanation-5: -Peristalsis. Peristalsis is the principal mechanism of movement in the oesophagus, although it also occurs in both the stomach and gut. Continuous segments of longitudinal smooth muscle rhythmically contract and relax.