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.
Each of the three parts is a major site of digestion and absorption. Absorption is a crucial part of the digestive system that brings the molecules from the digested food into the blood and, ultimately, the cells. Problems with your small or large intestine can affect the way your body absorbs and digests food, leading to malnutrition.