From Food :
From Food Our teeth start the process by chewing and grinding up each mouthful, while the tongue works it into a ball-shaped bolus for swallowing.
Moistening saliva fed into the mouth from nearby glands starts the process of chemical digestion using specialized proteins called enzymes.
Secreted at various points along the digestive tract, enzymes break down large molecules of food into smaller molecules that the body is able to absorb.
In Progress :
In Progress Once we swallow, digestion becomes involuntary.
Food passes down the throat to the esophagus, the first of a succession of hollow organs that transport their contents through muscular contractions known as peristalsis.
Esophagus to Stomach :
Esophagus to Stomach The esophagus empties into the stomach, a large, muscular chamber that mixes food up with digestive juices including the enzymes pepsin, which targets proteins, and lipase, which works on fats.
Hydrochloric acid likewise helps to dissolve the stomach contents while killing potentially harmful bacteria.
The resulting semifluid paste—chyme—is sealed in the stomach by two ringlike sphincter muscles for several hours and then released in short bursts into the duodenum.
Intestine :
Intestine The first of three sections of the small intestine, the duodenum produces large quantities of mucus to protect the intestinal lining from acid in the chyme.
Measuring about 20 feet (6 meters) in length, the small intestine is where the major digestion and absorption of nutrients take place.
These nutrients are taken into the bloodstream, via millions of tiny, fingerlike projections called villi, and transported to the liver.
The End :
The End What's left in the digestive tract passes into the large intestine, where it's eaten by billions of harmless bacteria and mixed with dead cells to form solid faeces.
Water is reabsorbed into the body while the faeces are moved into the rectum to await expulsion.
By Health Advice Online :
By Health Advice Online http://healthadviceonline.sgprofitsite.com