But just because you have a gym membership that you actually use doesnât mean you canât also have a few things at home for doing other types of workouts that you donât have time for at the gym, or for those days that you just canât make it out the front door.
The inside wall of the small intestine needs to be thin, with a really big surface area. This allows absorption to happen quickly and efficiently. If the small intestine had a thick wall and a small surface area, a lot of digested food might pass out of the body before it had a chance to be absorbed.
While the food travels on its 20-foot trip through the small intestine, it is being broken down more and more by the intestineâs digestive juices until most of it is in liquid form. This liquid is then absorbed through the small intestineâs walls into your blood stream. Your blood stream takes the liquid to all parts of your body to feed its cells. The parts of food that your body hasnât digested and cannot use go into a fat, coiled 5-foot-long tube called the large intestine. There, water is absorbed from that remaining food and returned to the blood stream, and the undigested food leaves your body as waste. It takes about 48 hours for your body to completely digest the food from one meal!